LONDON, May 15 (Reuters) - Investors placed orders worth more than 27 billion pounds ($36.55 billion) at the launch of a new British government bond due to mature in October 2071, one of the bookrunners on the deal said on Tuesday.
The gilt, which carries a 1.625 percent coupon, is likely to be priced to yield up to 0.5 basis points less than the current longest-dated gilt, which matures in July 2068.
The syndication is led by Barclays, Deutsche Bank , Goldman Sachs International and NatWest Markets as joint bookrunners.
Books are due to close at 0900 GMT, and pricing is expected late on Tuesday. ($1 = 0.7387 pounds) (Reporting by David Milliken; editing by Michael Holden)