I'm in the process of applying for a Career Development Loan as they are currently offered by Barclays and the Cooperative Bank. You can get up to £10,000 as long as you don't have access to more than £16,000 personally.
I know this is a very basic point but before you commit to any course ensure that you have got a contingency fund (mine is at least 15%) in addition to the course costs and you also need to be 110% clear about what extras you need to pay for i.e. CAA Test fees for CPL and IR exams, aircraft hire for test, landing fees etc.
I've found putting together a spreadsheet of costs including living expenses etc for whilst doing the course helpful for budgeting purposes.