which colonies?
I have recently heard of a student who has returned from South Africa having been greatly disappointed with his chosen training provider. He cancelled the CPL course he was booked on and has re-booked one in the UK.
Training outside of the UK has good and bad points.
Either make sure the training provider is JAA approved or be prepared to convert your licence to JAA upon your return to the UK.
CPL conversion from a recognised ICAO licence = training as required + pass the CPL skills test with the CAA
IR conversion from a recognised ICAO licence = 15 hours minimum training + pass the IR skills test with the CAA
It has been noticed that students returning from eg USA, have required a few extra hours to familiarise themselves with UK airspace, procedures and RT, as there are a few differences (lots of airspace cramped into a small island!)
The obvious good point is the cost of the flying! but does the saving on the course cover the cost of living in a foreign country, flights there and back, and, if necessary, licence conversion?
A few things to consider, hopefully you have found this of some help?!?!