london april 27 reuters  goldman sachs said on thursday it was raising its forecast for the peak of interest rates set by the bank of england to 5 citing strongerthanexpected activity in britains economy the boes bank rate stands at 425 and investors in interest rate futures are putting a roughly 90 chance on an increase to 45 on may 11 after the boes next scheduled meeting and a 60 probability of it hitting 5 by september