Here is the account of a polish veteran who speaks about "Caron School" where was the 12th batallion... Again found by André.
BBC - WW2 People's War - Village to Village: From Poland to Britain
"Our HQ was moved to Kinaird House, Larbert outside Falkirk. Our company was stationed in Carron school. We were given new field radios in motorised vans. We went on excercise with the Scottish army for 2 weeks. In a small village square Tellibody? or Tillicoultry? I cannot remember now, I was chatted up by a young Scottish woman. I declined as I dare not leave the radio."
I have so indicated to the owner of this paybook I could not propose it on my blog (only 1rst pol arm div) and I identified it for him and... he was not happy... collectors are strange sometimes...