Thanks for the reply
If it's mitred first then that means pushing against the glass - which is counter intuative - but explains why I had such difficulty
I can fabricate a tool to do this like Soubers and give it a go
I had 2 windows fitted 2000 ish whose glazing units need replacing as they are misted- I can usually take the beads out easily but these are being a bit of a mare
Can anyone please identify and tell me the correct way to remove as I've had to butcher the 2 sides to remove and don't want to...