I think first you need to consider why you want to be an airline pilot and if you have the aptitude and are willing to make significant sacrifices in order to achieve this goal.
You should spend a lot of time reading the Terms and Endearment forums. It will enlighten you as to the T&C's on offer should you be in that small % of people that successfully gain employment after training.
The stark reality is that after all your hard work that you will more than likely never be employed. This could be for a number of reasons - fate, lack of flying ability, poor timing, bad interview skills, lack of technical knowledge, inability to network. The list goes on and on.
Should you on the other hand be successful then by far the largest employer in Western Europe is Ryanair. They require you to fund your type rating and in effect subsidise your own training through reduced pay initially. You will have no guarantee of which base you will be allocated on successful completion of your training. More than likely this will be away from your home and it may well be in a different country. You can bid for a home base but this will be subject to company requirements. You will work a 5/4 roster rotating between lates and earlies every other week. On your days off you can commute home on the jump seat subject to space available. In addition to keeping up your mortgage payments back in the UK and paying off any debts you have accrued on your training you will need to organise accommodation for when you are working. You could find yourself in a very expensive overseas base.
As other posters have said, do your PPL and build your hours. Talk to as many airline pilots you can and find out if this career is really for you and you are willing to make the necessary sacrifices. Professional flight training now is not recommended as the industry is in turmoil and will take years to sort itself out, if it ever does. Good luck.