Capt Apache,
If you were to come to the UK to fly for a short term period, you would only do the Air Law exam, and sim check then be issued a validation for a period of one year.
However, we do not have a need for non JAA pilots at the momemt so you would be required to obtain a full JAA ATPL, and apply to th airlines via the normal channels.
So again barking up the wrong tree and making yourself look silly.
PT6A