Cashback.co.uk is a great site where you work through free trials, signups etc. And get paid for each one you do (around £7 per one). Once you have completed 15 you can cash out, I made over £200!
Sign up here for £5 free! https://www.cashback.co.uk/referred?by=06a00233-1ecd6da0-94e1-61b6-87cb-444230303032&utm_source=affiliate&utm_medium=non-incentive&utm_campaign=18622-