I think that an earlier post raised the issue that since UK legislation requires twins for many operations, the lack of single engine accidents/incidents is skewed because they do not feature in the operation anyway!
I've had engine failures in twins and in singles. A PT6 turbine letting go over the North Sea it was very nice to have the other half of the Twin-Pac to get me to the nearest suitable platform. A C20 compressor shredding on late finals to a floating pad on the Yarra River was justification in taking a steep approach to such a pad with an auto from short finals. I wouldn't have liked to have the same failure 3 minutes earlier when I was flying down LaTrobe Street at 50 feet, and retrospectively a twin should have been used for such an exposed operation.
Not UK, but certainly my experiences back up some of the demands made by the CAA.