I learnt to fly from the international airport in Glasgow, my little PA 38 Tomahawk mixing in with all the other heavy metal. We were routinely wake turbulence separated in class D.
This stemmed from a little incident when a friend of mine, following a BAe 146 or B757 (can't remember which - but something with extraordinary wake vortices) was coming in to land in the tomahawk when the wake vortex from the preceeding aircraft drifted across the runway and flipped him over - the next thing he knew he was staring up at the tarmac - the 4-pt harness saved his life.