Never heard of numpty but familiar with the others. Since daughter and her family have lived in London for 6-7 years in two stints, a lot of these have become common for us even. I like the one "proper." When they moved there a little over year ago the first indication that five year old grandaughter was being indoctrinated was her use of "let me have a go" instead of "let me have a turn." As an aside, I do think the UK living is finally getting to the mother and father; aside from the confines and difficulties of London living, it's no fun having your 3 and 5 year olds correct your pronunciations!