Sounds to me like the best thing to do is follow a modular route to your frozen ATPL. But, before you spend a single penny on flying, spend £25 on this:
http://www.ppl-atpl.demon.co.uk/
(Clive Hughes's guide to getting a Commercial Pilots Licence)
It's WELL worth the money. I am not exaggerating when I say that it can, potentially, for itself 1000 times over!
If you go down the modular route, you might want to consider doing it all with one training provider, and without any gaps. This creates good continuity in the training, and is looked at very positively by prospective recruiters.