I don't want to sound like a killjoy either but.....there are no 'pilot specific' loans.
If you don't have the money yourself, or at least someone to provide it (i.e. parents/spouse/rich aunty or uncle) then your only realistic option is the modular route.
There are some companies (such as egg) that may lend you large sums unsecured (i.e. 15-20k) but at you age (our age) the likelyhood of passing the credit check is low. Even if you passed, you must consider how on earth your going to pay it back - you will be lucky to get a low paid instructors job at the end of it. In addition, 15-20k is only half the amount you'll need for an integrated course.
However, I am considering a Professional Studies loan from Barclays (Typically 10-15k max) which will pay for my IR. I have already managed to pay for my PPL/Hour Building/Class 1 Medical/Bristol Groundschool Course/CAA Exam Fees myself. By the time I need to do my CPL/IR, I will have saved the cash for the CPL so only need a loan for the IR, perhaps an FI(R) too.
An interesting point here is that I have only managed to raise this sum of money FROM going to university, because the pay I get now is substantially more than the potential earnings without a degree. It does, of course, depend on your choice of degree.
Bodie