Dave

Here's the link:
http://www.maplin.co.uk/p/305x203mm-fibreglass-single-sided-pcb-board-wf41u

No thickness shown, but the fibreglass base is between 1 & 2mm.
This is single sided. I usually get double sided but it doesn't matter - it's usually what Maplins in Sheffield have in stock.

DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4