Hi, hopefull I can be of some help, as I used to be the ‘Von Perthes’ who posted in the old thread you referred to.

‘Blwfa’ was a mythical creature, invented by ‘Bexley’s pilot, Chris Doll, somewhat akin to ‘Crabs’!

I spent some years researching AD554/’BEXLEY’, and 131 (County of Kent) Squadron in general, as I live in the London Borough of Bexley. All of my stuff on ‘Bexley’ & 131 Sqn is now with Gerry Burke who is gedburke3 on here so maybe he can help you more.

I did find this on a old backup CD

Geoff