I was doing my CPL at the end of last year, which soon became the beginning of 2003! I would suggest in general that the weather is likely to impact upon taking a CPL at that time of year (in the UK) and as a result training will become longer and more expensive. From a cost point of view, and if I wanted to train in the winter, you could try gaining your CPL in the USA and then take the IR back in the UK. Having said that, I feel that I am better pilot for having flown my CPL/IR throughout a British winter even if I am a little poorer!