What do you want most? Money or support?
I went with the princes trust but diddnt take out the loan, the support I had is invaluable, I highly reccomend the princes trust, the mentoring is amazing.
You could do the enterprise course for free just to get an idea of what their all about, They help you to explore your business idea with no ties, you only apply for a loan if you want to. I've been on both sides of the course as a learner & an inspirational speaker, the repayment rate is very low with the trust but you need to have a reasonable credit rating & convince the panel that your business is viable in order to get the loan, which may sound a little scary but it's in your best interest to know your business inside out!
I know a young person who recently started a business with a £15k loan who has no support and has made 1 sale in a year of trading, My heart goes out to him as he could do so well with the right support, his workshop is seriously top of the range! Then on the flip side I started my business with zero cash but great support and I'm going strong 3 years in.