Tom - Being from the U.S., I acknowledge and celebrate our language differences. You say 'fitting' and I say 'seizing'. So what is a tyre fitter? Does he/she shake uncontrollably when replacing your tyre? Seems like it would make the job oh so much more difficult. You've also mentioned 'fitters' in other mechanically inclined jobs, such as auto body repairers, if I recall correctly. Anyway, I shouldn't talk, as I know damn well that the 'American English' has just as many, if not more, perplexities to it. Just thought I'd mention it.