Sounds like you done good!!
Ultimatley even if the ATCO was forgetful then safety wasn't comprimised so no issue. You did your bit well so no harm done (apart from 10 quid to go around the circuit!!)
As for decision height. If I'm happy with the approach, but don't get a clearance then I'll happily wait until 20ft agl before going around (late clearances are par for the course at EGKA - if we went around if we didn't get a clearance at 200ft we'd all still be up there now!).
However if it's a dodgy approach (you know - upside down on finals that kind of thing) the 200ft is about bang on.