Credit Suisse (Eur) - EPT Disclosure

RNS Number:5692I
Credit Suisse Securities (Eur) Ltd
27 November 2007

FORM 38.5 (b)
DEALINGS BY CONNECTED EXEMPT PRINCIPAL TRADERS
WITHOUT RECOGNISED INTERMEDIARY STATUS, OR WITH RI STATUS
BUT NOT DEALING IN A CLIENT-SERVING CAPACITY
(Rule 38.5(b) of the Takeover Code)

1. KEY INFORMATION

Name of exempt principal trader Credit Suisse Securities (Europe) Limited
Company dealt in BHP Billiton
Class of relevant security to which the dealings being Ordinary Shares
disclosed relate (Note 1)
Date of dealing 26-Nov-2007

2. INTERESTS, SHORT POSITIONS AND RIGHTS TO SUBSCRIBE

(a) Interests and short positions (following dealing) in the class of relevant security dealt in (Note 2)

Long Short
Number (%) Number (%)

(1) Relevant securities 2515125 0.111
(2) Derivatives (other than options)
(3) Options and agreements to purchase/sell

Total 2515125 0.111

(b) Interests and short positions in relevant securities of the company, other than the class dealt in (Note 2)
Class Of Relevant Security : Ordinary Shares ( AU000000BHP4 Long Short
)

(1) Relevant Securities
(2) Derivatives (other than options)
(3) Options and agreements to purchase/sell

Total 0 ( 0 % ) 0 ( 0 % )

(c) Rights to subscribe (Note 2)

Class of relevant security: Details

3. DEALINGS (Note 3)

(a) Purchases and sales

Purchase/sale Number of securities Price per unit (Note 4)
Buy 9948 15.63 (GBP)
Buy 9948 16 (GBP)
Buy 9937 15.97 (GBP)
Buy 9148 15.48 (GBP)
Buy 9000 15.62 (GBP)
Buy 7547 15.98 (GBP)
Buy 7500 16.21 (GBP)
Buy 7245 15.76 (GBP)
Buy 6835 16.2 (GBP)
Buy 6473 15.57 (GBP)
Buy 6164 15.51 (GBP)
Buy 5453 15.42 (GBP)
Buy 5000 15.57 (GBP)
Buy 5000 16.23 (GBP)
Buy 5000 15.46 (GBP)
Buy 5000 15.61 (GBP)
Buy 4862 15.46 (GBP)
Buy 4843 16.02 (GBP)
Buy 4761 15.57 (GBP)
Buy 4611 16.23 (GBP)
Buy 4126 16.16 (GBP)
Buy 3450 16.01 (GBP)
Buy 3291 15.43 (GBP)
Buy 3252 16 (GBP)
Buy 3206 15.99 (GBP)
Buy 3140 15.4 (GBP)
Buy 3140 15.4 (GBP)
Buy 3124 15.49 (GBP)
Buy 3105 15.65 (GBP)
Buy 3024 15.66 (GBP)
Buy 2985 16 (GBP)
Buy 2977 16.01 (GBP)
Buy 2903 15.49 (GBP)
Buy 2807 16.02 (GBP)
Buy 2605 15.59 (GBP)
Buy 2530 15.66 (GBP)
Buy 2500 15.4 (GBP)
Buy 2468 16.01 (GBP)
Buy 2441 15.43 (GBP)
Buy 2426 15.43 (GBP)
Buy 2415 15.65 (GBP)
Buy 2400 15.96 (GBP)
Buy 2290 15.96 (GBP)
Buy 2274 16.2 (GBP)
Buy 2273 15.98 (GBP)
Buy 2263 15.49 (GBP)
Buy 2227 16.16 (GBP)
Buy 2177 15.98 (GBP)
Buy 2157 15.43 (GBP)
Buy 2100 15.47 (GBP)
Buy 2088 15.51 (GBP)
Buy 2069 15.95 (GBP)
Buy 1992 16 (GBP)
Buy 1918 15.64 (GBP)
Buy 1907 15.4 (GBP)
Buy 1766 15.98 (GBP)
Buy 1761 15.4 (GBP)
Buy 1760 15.47 (GBP)
Buy 1755 16 (GBP)
Buy 1747 15.69 (GBP)
Buy 1735 15.99 (GBP)
Buy 1726 15.64 (GBP)
Buy 1672 15.99 (GBP)
Buy 1645 15.47 (GBP)
Buy 1616 15.96 (GBP)
Buy 1611 16 (GBP)
Buy 1580 15.39 (GBP)
Buy 1509 15.45 (GBP)
Buy 1500 15.99 (GBP)
Buy 1500 16 (GBP)
Buy 1500 15.49 (GBP)
Buy 1436 15.49 (GBP)
Buy 1418 16.2 (GBP)
Buy 1409 15.96 (GBP)
Buy 1380 15.65 (GBP)
Buy 1359 16 (GBP)
Buy 1325 16.04 (GBP)
Buy 1297 15.45 (GBP)
Buy 1288 15.64 (GBP)
Buy 1256 16.04 (GBP)
Buy 1240 15.66 (GBP)
Buy 1238 15.51 (GBP)
Buy 1215 16 (GBP)
Buy 1209 16.02 (GBP)
Buy 1200 15.69 (GBP)
Buy 1200 15.95 (GBP)
Buy 1168 15.94 (GBP)
Buy 1155 15.41 (GBP)
Buy 1121 15.99 (GBP)
Buy 1108 15.97 (GBP)
Buy 1035 16 (GBP)
Buy 1014 16.02 (GBP)
Buy 1000 15.45 (GBP)
Buy 1000 15.45 (GBP)
Buy 969 15.99 (GBP)
Buy 965 15.43 (GBP)
Buy 955 15.76 (GBP)
Buy 926 16 (GBP)
Buy 900 16.02 (GBP)
Buy 894 15.98 (GBP)
Buy 883 16.06 (GBP)
Buy 880 15.47 (GBP)
Buy 879 16.01 (GBP)
Buy 875 15.98 (GBP)
Buy 860 15.44 (GBP)
Buy 836 16.06 (GBP)
Buy 800 15.49 (GBP)
Buy 800 15.48 (GBP)
Buy 783 15.48 (GBP)
Buy 776 15.65 (GBP)
Buy 752 15.64 (GBP)
Buy 732 16.2 (GBP)
Buy 718 15.47 (GBP)
Buy 715 15.99 (GBP)
Buy 712 15.69 (GBP)
Buy 703 15.43 (GBP)
Buy 690 15.97 (GBP)
Buy 672 15.44 (GBP)
Buy 660 15.47 (GBP)
Buy 623 16.14 (GBP)
Buy 600 15.96 (GBP)
Buy 600 15.99 (GBP)
Buy 575 16.2 (GBP)
Buy 565 15.49 (GBP)
Buy 556 15.97 (GBP)
Buy 529 15.47 (GBP)
Buy 516 16.23 (GBP)
Buy 500 16 (GBP)
Buy 500 15.99 (GBP)
Buy 500 16 (GBP)
Buy 500 15.57 (GBP)
Buy 500 15.66 (GBP)
Buy 500 15.62 (GBP)
Buy 500 15.43 (GBP)
Buy 500 15.45 (GBP)
Buy 498 15.45 (GBP)
Buy 495 16.2 (GBP)
Buy 487 15.39 (GBP)
Buy 484 15.43 (GBP)
Buy 475 16.16 (GBP)
Buy 453 15.48 (GBP)
Buy 416 15.44 (GBP)
Buy 397 15.99 (GBP)
Buy 389 15.99 (GBP)
Buy 381 15.95 (GBP)
Buy 375 15.5 (GBP)
Buy 375 15.48 (GBP)
Buy 371 16 (GBP)
Buy 370 15.57 (GBP)
Buy 370 15.44 (GBP)
Buy 369 15.57 (GBP)
Buy 368 15.61 (GBP)
Buy 368 15.99 (GBP)
Buy 367 15.95 (GBP)
Buy 366 15.99 (GBP)
Buy 365 15.5 (GBP)
Buy 364 16.18 (GBP)
Buy 362 15.61 (GBP)
Buy 361 15.98 (GBP)
Buy 359 15.49 (GBP)
Buy 357 15.58 (GBP)
Buy 356 15.98 (GBP)
Buy 356 15.63 (GBP)
Buy 356 16.01 (GBP)
Buy 355 15.96 (GBP)
Buy 354 15.99 (GBP)
Buy 353 15.94 (GBP)
Buy 352 15.94 (GBP)
Buy 352 15.99 (GBP)
Buy 351 15.99 (GBP)
Buy 348 15.99 (GBP)
Buy 348 15.54 (GBP)
Buy 347 15.93 (GBP)
Buy 345 15.95 (GBP)
Buy 345 15.69 (GBP)
Buy 345 15.65 (GBP)
Buy 344 15.53 (GBP)
Buy 344 15.99 (GBP)
Buy 343 15.945 (GBP)
Buy 341 15.99 (GBP)
Buy 341 15.99 (GBP)
Buy 340 15.6 (GBP)
Buy 338 15.99 (GBP)
Buy 337 15.97 (GBP)
Buy 332 15.52 (GBP)
Buy 331 16.015 (GBP)
Buy 328 15.64 (GBP)
Buy 327 16.02 (GBP)
Buy 327 15.95 (GBP)
Buy 327 15.47 (GBP)
Buy 324 15.94 (GBP)
Buy 324 15.93 (GBP)
Buy 324 16.03 (GBP)
Buy 323 15.52 (GBP)
Buy 320 15.985 (GBP)
Buy 320 15.51 (GBP)
Buy 318 16 (GBP)
Buy 316 15.79 (GBP)
Buy 316 15.615 (GBP)
Buy 315 15.52 (GBP)
Buy 314 15.99 (GBP)
Buy 313 16.02 (GBP)
Buy 306 15.96 (GBP)
Buy 306 15.98 (GBP)
Buy 306 15.98 (GBP)
Buy 303 15.68 (GBP)
Buy 299 15.96 (GBP)
Buy 294 15.55 (GBP)
Buy 293 16 (GBP)
Buy 289 15.45 (GBP)
Buy 278 15.51 (GBP)
Buy 274 16.005 (GBP)
Buy 272 15.43 (GBP)
Buy 269 15.99 (GBP)
Buy 269 15.52 (GBP)
Buy 268 15.94 (GBP)
Buy 265 15.98 (GBP)
Buy 261 15.97 (GBP)
Buy 261 15.57 (GBP)
Buy 252 15.47 (GBP)
Buy 246 15.97 (GBP)
Buy 242 15.99 (GBP)
Buy 233 15.55 (GBP)
Buy 224 15.51 (GBP)
Buy 223 15.61 (GBP)
Buy 195 15.99 (GBP)
Buy 188 15.99 (GBP)
Buy 187 15.97 (GBP)
Buy 187 15.565 (GBP)
Buy 185 16 (GBP)
Buy 183 15.47 (GBP)
Buy 182 15.85 (GBP)
Buy 182 15.95 (GBP)
Buy 181 15.91 (GBP)
Buy 181 16 (GBP)
Buy 181 16.02 (GBP)
Buy 179 16.06 (GBP)
Buy 179 15.48 (GBP)
Buy 177 15.98 (GBP)
Buy 176 16.02 (GBP)
Buy 175 15.44 (GBP)
Buy 174 16 (GBP)
Buy 173 15.44 (GBP)
Buy 173 15.97 (GBP)
Buy 170 15.49 (GBP)
Buy 169 15.59 (GBP)
Buy 166 15.97 (GBP)
Buy 161 15.5 (GBP)
Buy 161 15.46 (GBP)
Buy 160 15.59 (GBP)
Buy 160 15.59 (GBP)
Buy 160 15.57 (GBP)
Buy 160 15.59 (GBP)
Buy 160 15.59 (GBP)
Buy 160 15.53 (GBP)
Buy 160 15.58 (GBP)
Buy 160 15.58 (GBP)
Buy 160 15.56 (GBP)
Buy 160 15.56 (GBP)
Buy 160 15.59 (GBP)
Buy 160 15.59 (GBP)
Buy 160 15.58 (GBP)
Buy 160 15.59 (GBP)
Buy 159 15.66 (GBP)
Buy 159 15.66 (GBP)
Buy 159 15.7 (GBP)
Buy 159 15.61 (GBP)
Buy 159 15.65 (GBP)
Buy 159 15.65 (GBP)
Buy 159 15.64 (GBP)
Buy 159 15.64 (GBP)
Buy 158 15.77 (GBP)
Buy 158 15.73 (GBP)
Buy 158 16.2 (GBP)
Buy 158 15.69 (GBP)
Buy 158 15.73 (GBP)
Buy 158 15.72 (GBP)
Buy 158 15.74 (GBP)
Buy 157 15.86 (GBP)
Buy 156 15.47 (GBP)
Buy 156 15.91 (GBP)
Buy 156 15.99 (GBP)
Buy 156 15.97 (GBP)
Buy 156 15.93 (GBP)
Buy 156 15.96 (GBP)
Buy 156 16 (GBP)
Buy 141 15.98 (GBP)
Buy 140 15.58 (GBP)
Buy 138 15.91 (GBP)
Buy 138 15.97 (GBP)
Buy 138 15.745 (GBP)
Buy 136 15.57 (GBP)
Buy 133 15.85 (GBP)
Buy 133 15.91 (GBP)
Buy 132 16.22 (GBP)
Buy 126 15.97 (GBP)
Buy 124 15.59 (GBP)
Buy 120 16.18 (GBP)
Buy 119 16.06 (GBP)
Buy 119 16.195 (GBP)
Buy 118 15.58 (GBP)
Buy 115 15.49 (GBP)
Buy 112 15.95 (GBP)
Buy 112 16.21 (GBP)
Buy 112 15.745 (GBP)
Buy 107 15.565 (GBP)
Buy 105 16.02 (GBP)
Buy 101 15.99 (GBP)
Buy 98 16.2 (GBP)
Buy 95 15.96 (GBP)
Buy 84 16 (GBP)
Buy 81 15.97 (GBP)
Buy 80 16 (GBP)
Buy 75 15.745 (GBP)
Buy 74 16.19 (GBP)
Buy 71 16.23 (GBP)
Buy 68 15.47 (GBP)
Buy 66 16.04 (GBP)
Buy 65 15.97 (GBP)
Buy 64 16 (GBP)
Buy 63 15.82 (GBP)
Buy 63 15.81 (GBP)
Buy 62 16.21 (GBP)
Buy 60 16.03 (GBP)
Buy 59 15.79 (GBP)
Buy 58 15.47 (GBP)
Buy 58 16 (GBP)
Buy 56 15.55 (GBP)
Buy 55 15.49 (GBP)
Buy 52 16 (GBP)
Buy 51 15.49 (GBP)
Buy 51 15.57 (GBP)
Buy 51 15.51 (GBP)
Buy 50 15.97 (GBP)
Buy 49 15.85 (GBP)
Buy 48 15.94 (GBP)
Buy 48 15.98 (GBP)
Buy 47 16 (GBP)
Buy 46 15.44 (GBP)
Buy 46 15.98 (GBP)
Buy 45 15.595 (GBP)
Buy 45 15.53 (GBP)
Buy 42 16.19 (GBP)
Buy 41 15.99 (GBP)
Buy 24 15.48 (GBP)
Buy 24 15.96 (GBP)
Buy 22 15.41 (GBP)
Buy 17 16 (GBP)
Buy 16 15.98 (GBP)
Buy 16 16 (GBP)
Buy 16 15.96 (GBP)
Buy 11 15.97 (GBP)
Buy 10 16 (GBP)
Buy 4 15.46 (GBP)
Buy 4 15.46 (GBP)
Buy 3 15.5 (GBP)
Buy 1 15.49 (GBP)
Sell 9948 15.45 (GBP)
Sell 9948 15.52 (GBP)
Sell 9948 15.66 (GBP)
Sell 9948 15.98 (GBP)
Sell 9822 15.52 (GBP)
Sell 9448 15.5 (GBP)
Sell 8200 15.84 (GBP)
Sell 7800 15.64 (GBP)
Sell 6862 15.61 (GBP)
Sell 6709 16.21 (GBP)
Sell 6612 16 (GBP)
Sell 5912 15.49 (GBP)
Sell 5000 15.59 (GBP)
Sell 4799 15.41 (GBP)
Sell 4616 15.57 (GBP)
Sell 4440 15.93 (GBP)
Sell 4415 15.62 (GBP)
Sell 4348 15.98 (GBP)
Sell 4230 15.97 (GBP)
Sell 4142 15.49 (GBP)
Sell 4080 15.42 (GBP)
Sell 4000 15.57 (GBP)
Sell 3806 15.43 (GBP)
Sell 3718 16.2 (GBP)
Sell 3668 16.24 (GBP)
Sell 3650 16.02 (GBP)
Sell 3475 15.37 (GBP)
Sell 3423 15.61 (GBP)
Sell 3379 16.02 (GBP)
Sell 3239 16.21 (GBP)
Sell 3123 15.98 (GBP)
Sell 3101 15.93 (GBP)
Sell 3099 15.94 (GBP)
Sell 3048 15.98 (GBP)
Sell 3047 16.02 (GBP)
Sell 3026 15.49 (GBP)
Sell 3021 15.99 (GBP)
Sell 2919 16.02 (GBP)
Sell 2716 15.99 (GBP)
Sell 2500 15.55 (GBP)
Sell 2314 16.03 (GBP)
Sell 2168 15.98 (GBP)
Sell 2092 15.65 (GBP)
Sell 2056 16 (GBP)
Sell 2000 15.43 (GBP)
Sell 2000 15.37 (GBP)
Sell 1989 16.24 (GBP)
Sell 1974 15.98 (GBP)
Sell 1955 16.24 (GBP)
Sell 1948 16.01 (GBP)
Sell 1820 15.88 (GBP)
Sell 1695 15.98 (GBP)
Sell 1600 15.65 (GBP)
Sell 1580 15.39 (GBP)
Sell 1500 15.98 (GBP)
Sell 1347 15.98 (GBP)
Sell 1337 15.61 (GBP)
Sell 1330 15.98 (GBP)
Sell 1318 15.88 (GBP)
Sell 1304 16.24 (GBP)
Sell 1300 16 (GBP)
Sell 1284 15.41 (GBP)
Sell 1204 16 (GBP)
Sell 1200 15.42 (GBP)
Sell 1168 15.84 (GBP)
Sell 1100 16.02 (GBP)
Sell 1073 16 (GBP)
Sell 1000 16.16 (GBP)
Sell 1000 15.95 (GBP)
Sell 984 16.24 (GBP)
Sell 955 15.64 (GBP)
Sell 942 16 (GBP)
Sell 930 16.02 (GBP)
Sell 924 16.03 (GBP)
Sell 902 15.55 (GBP)
Sell 900 15.99 (GBP)
Sell 900 15.39 (GBP)
Sell 894 15.96 (GBP)
Sell 888 16.03 (GBP)
Sell 847 15.98 (GBP)
Sell 822 15.96 (GBP)
Sell 813 15.63 (GBP)
Sell 800 15.49 (GBP)
Sell 778 15.65 (GBP)
Sell 741 15.98 (GBP)
Sell 677 15.55 (GBP)
Sell 676 15.55 (GBP)
Sell 676 15.55 (GBP)
Sell 668 15.97 (GBP)
Sell 600 15.97 (GBP)
Sell 594 16.02 (GBP)
Sell 591 15.99 (GBP)
Sell 567 15.61 (GBP)
Sell 553 16 (GBP)
Sell 521 15.98 (GBP)
Sell 500 15.5 (GBP)
Sell 500 15.65 (GBP)
Sell 500 15.65 (GBP)
Sell 500 15.66 (GBP)
Sell 500 15.66 (GBP)
Sell 500 15.65 (GBP)
Sell 500 15.49 (GBP)
Sell 500 15.95 (GBP)
Sell 500 15.95 (GBP)
Sell 500 15.95 (GBP)
Sell 466 15.97 (GBP)
Sell 460 15.48 (GBP)
Sell 446 15.59 (GBP)
Sell 432 15.64 (GBP)
Sell 408 16.2 (GBP)
Sell 400 15.55 (GBP)
Sell 389 16.18 (GBP)
Sell 380 15.64 (GBP)
Sell 376 15.65 (GBP)
Sell 356 15.63 (GBP)
Sell 354 15.99 (GBP)
Sell 352 15.99 (GBP)
Sell 345 15.41 (GBP)
Sell 326 16.03 (GBP)
Sell 324 16.03 (GBP)
Sell 316 16.05 (GBP)
Sell 309 16.15 (GBP)
Sell 263 16.16 (GBP)
Sell 239 16.03 (GBP)
Sell 229 15.95 (GBP)
Sell 226 15.47 (GBP)
Sell 226 15.47 (GBP)
Sell 226 15.47 (GBP)
Sell 226 15.47 (GBP)
Sell 226 15.47 (GBP)
Sell 226 15.47 (GBP)
Sell 200 15.57 (GBP)
Sell 200 15.57 (GBP)
Sell 199 16.02 (GBP)
Sell 186 15.57 (GBP)
Sell 183 15.64 (GBP)
Sell 180 15.97 (GBP)
Sell 175 15.99 (GBP)
Sell 162 15.4 (GBP)
Sell 162 15.4 (GBP)
Sell 162 15.43 (GBP)
Sell 162 15.43 (GBP)
Sell 161 15.44 (GBP)
Sell 161 15.44 (GBP)
Sell 160 15.54 (GBP)
Sell 160 15.61 (GBP)
Sell 160 15.55 (GBP)
Sell 160 15.58 (GBP)
Sell 160 15.57 (GBP)
Sell 160 15.59 (GBP)
Sell 160 15.59 (GBP)
Sell 160 15.59 (GBP)
Sell 160 15.53 (GBP)
Sell 160 15.54 (GBP)
Sell 160 15.55 (GBP)
Sell 160 15.54 (GBP)
Sell 160 15.54 (GBP)
Sell 159 15.63 (GBP)
Sell 159 15.63 (GBP)
Sell 159 15.63 (GBP)
Sell 159 15.68 (GBP)
Sell 159 15.65 (GBP)
Sell 159 15.65 (GBP)
Sell 159 15.66 (GBP)
Sell 159 15.66 (GBP)
Sell 159 15.66 (GBP)
Sell 159 15.69 (GBP)
Sell 156 16.01 (GBP)
Sell 155 16 (GBP)
Sell 154 15.96 (GBP)
Sell 148 15.47 (GBP)
Sell 148 16 (GBP)
Sell 141 15.94 (GBP)
Sell 120 15.59 (GBP)
Sell 117 16 (GBP)
Sell 115 15.98 (GBP)
Sell 107 15.59 (GBP)
Sell 100 15.96 (GBP)
Sell 96 15.66 (GBP)
Sell 88 16.03 (GBP)
Sell 86 16.02 (GBP)
Sell 72 16.03 (GBP)
Sell 60 15.61 (GBP)
Sell 58 16 (GBP)
Sell 48 16.24 (GBP)
Sell 46 15.61 (GBP)
Sell 46 15.55 (GBP)
Sell 44 15.59 (GBP)
Sell 41 15.96 (GBP)
Sell 40 15.52 (GBP)
Sell 31 16.03 (GBP)
Sell 29 15.98 (GBP)
Sell 16 15.98 (GBP)
Sell 8 15.98 (GBP)
Sell 7 15.97 (GBP)
Sell 6 15.99 (GBP)
Total Buys 355229

Total Sells 295570
(b) Derivatives transactions (other than options)
Product name, e.g. CFD Long/short (Note 5) Number of securities (Note 6) Price per unit (Note 4)

(c) Options transactions in respect of existing securities
(i) Writing, selling, purchasing or varying
Product Writing, selling, Number of securities to Exercise Type, e.g. Expiry Option money paid/
name,e.g. call purchasing, varying which the option relates price American, date received per unit
option etc. (Note 6) European etc. (Note 4)

(ii) Exercising
Product name, e.g. call option Number of securities Exercise price per unit (Note 4)

(d) Other dealings (including new securities) (Note 3)
Nature of transaction (Note 7) Details Price per unit (if applicable) (Note 4)

4. OTHER INFORMATION
Agreements, arrangements or understandings relating to options or derivatives
Full details of any agreement, arrangement or understanding between the person disclosing and any other person relating
to the voting rights of any relevant securities under any option referred to on this form or relating to the voting
rights or future acquisition or disposal of any relevant securities to which any derivative referred to on this form is
referenced. If none, this should be stated.

Is a Supplemental Form 38.5(b) attached? (Note 8) No

Date of disclosure

Contact name Collins,Carolyn

Telephone number 44 20 7888 0241

Name of offeree/offeror with which connected Rio Tinto Plc

Nature of connection (Note 9) ADVISOR

Notes

The Notes on Form 38.5(b) can be viewed on the Takeover Panel's website at http://www.thetakeoverpanel.org.uk/.

This information is provided by RNS
The company news service from the London Stock Exchange
END

EMMFEUFSWSWSEIF