Used to fish decoy a bit but mainly Masons or clearwater as it's sometimes called. Lot's of nice lean commons that fight like stink. Lovely looking lake as well. Never had a double but sure there were at least a couple in there. Great fun fishing with a float to the lilys or reeds on a nice summer evening. Was my favourite place to fish for years, lots of fond memories!
Early one morning had a tench of about 3 1/2 to 4lbs, dark dark green. Although that was the only one I ever had.