Yes it was me that sang it. There's an interview with Robb at The Night Cafe with a short passage about the origin of Cold In The Trenches:

"RJ: 'Cold In The Trenches' was written whilst we were going around The Bedford House Cemetery near Ypres. These cementeries are very very moving. Chilling. We'd decided the lads would probably have preferred having a beer to being slaughtered, so we went and had several for them. On my inevitable way to the toilet, I noticed it was raining, and thought "god, it would be cold in those trenches tonight..." "

Mick