Hi Brian:
There was a 151 Squadron loss that day, but as far as I can see, the crew were lost to flak while attacking rail targets, with this being witnessed by another 151 Squadron crew.
ORB is pretty much transcribed here:
http://www.151squadron.org.uk/
The 157 Sqn aircraft I was thinking of was lost on 9 September 1944 off Lowestoft, apparently to a 109, but I've not been able to find a matching claim. I thought it might have been a 51.
Perhaps you're thinking of the 107 Sqn incident on 28 March '44?
Cheers,
Mark