What a damned shame.
I saw him with Finn McCuill in a production of Joe's Drum (7:84) in Edinburgh in the late 70s.
A few years later, I slept under his kitchen table (don't ask) in the flat in Clark St.

Caught up with him with the Macs over the years.
My sympathy is with his family and friends and particularly with Ian. First Derek, now Nick. How diabolical!