LONDON, May 21 (Reuters) - Britain's FTSE 100 index is seen opening down 10 to 12 points, or as much as 0.2 percent lower on Wednesday, according to financial bookmakers. For more on the factors affecting European stocks, please click on
* The UK blue chip index closed down by 42.55 points, or 0.6 percent, at 6,802.00 points on Tuesday, pressured by sell-offs in mobile operator Vodafone and retailer Marks & Spencer after disappointing forecasts from both companies.
* Stocks trading ex-dividend, namely Carnival, Compass, HSBC and Intertek will knock up to 5.42 points off the index on Wednesday.
ANTOFAGASTA holds its annual general meeting
BURBERRY reports full-year results
LEGAL & GENERAL holds its annual general meeting
SSE reports full-year results
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