That's really sad news...
I was lucky to experience a reformed Damned at this festival back in 1988. Just looking now at the poster, and realsing what a pretty fine billing that was!
Rest in peace Brian.
The only time I saw Brian was with the original Damned line-up around that time as well. It was an all-day event at Brixton Academy. They played most of the first album and then Captain switched to guitar with either Bryn Merrick or Paul Gray taking over on bass and Roman Jugg on keyboards.
Sounds like his death was quite sudden from what Captain has posted.