The easiest way would be to sell your car now to a secondhand dealer. Ring around and get some valuations.
Your
PCP contract you signed will be with a finance company. You are entitled to pay off the remaining amount owed at anytime. You don't have to wait until the end of the contract length. Just ring them up and ask them for a "Settlement Value". They are then obliged to send/email you a letter stating how much you owe to pay off the car (its valid for around 3 weeks) . You then tell the secondhand dealer you have outstanding finance that you want them to pay off and give them a copy of the settlement value letter. You will get any extra positive balance.
So lets say for example your car is worth around £11,500 and the best secondhand dealer offers you £11,400.
and lets say your settlement value is £10,400.
You sell your car to the secondhand dealer and they pay the £10,400 to your finance company and £1000 to you.
If you have £10,400 cash lying around
you could just settle the finance yourself and sell the car yourself.