As has been said, it is a very high risk strategy, however the rewards are high.
If you can afford to lose the money, do it.
If you can't, do your homework and think it through properly before doing it. You are likely to be throwing that money away if your plans come to nought. Would the £15 or so grand be better spent on an instructors rating, leaving some cash over to help live on an instructor's salary?
As has been said, the CTC scheme is a better bet for those 34 or younger.
A well-worn route is buying a type rating on an older turboprop (Shed, F27) - the likes of BAC and Streamline get many of their pilots this way, so you stand a good chance of being employed and will get plenty of multi-turbine hours in return, however it's a lot of money to pay for a type rating on an obsolescent aircraft flown by few operators.
The other option is a B737 or A320 type rating. Personally, if I had the cash to throw away I'd be tempted to go for a 737NG rating due to the large number of potential airlines in the UK(whilst keeping an eye on Easy/Go's fleet expansion plans because they might go A320).
cheers!
foggy.