This is a subject I've been wondering about myself, I also have this kit (and will be starting work on it next month hopefully) and would like to paint it in "Western Approaches" camouflage rather than the usual overall grey. I know many armed trawlers (including presumably some of the Round Table class) were painted like this, but I haven't yet managed to find any photos of a Round Table class ship in camo.
If all else fails I'll just have to base the camo pattern on photos of other trawler classes, but it would be nice to be able to use the correct pattern!