Steve
Difficult to advise you given the limited information you provided but for what it is worth here are some pointers:
There were plenty of people I met along the way who failed because they ran out of money. Don't budget on getting through every exam/test first time it will not happen.
Try to find contingency funds from anywhere should your loan run out.
Do as much studying/exams/tests whilst still in full/part-time employment elsewhere unless you can raise the capital (£40k plus) to go for it in one go.
Save every penny you can and cadge/beg every hour in a plane possible.
If you have a partner/spouse make sure you have their total commitment, they will be way down the priority list whilst you are studying.
Remember at the end of it you still may not get a job straight away but don't give up.
Enjoy the process.
The bottom line is get the finances sorted out first, you can not afford the distraction, stress and agro of running low on funds part the way through.
Good Luck.