Ok, so here is how it worked for me.
Go through topcashback websitehttp://www.quidco.com/amazon#description
- or try - https://www.quidco.com/visit-prep/4412/None/no-cashback/voucher/5435
now close that pop up, after copying the code, and you should be redirected to Amazon now add the camera to your Amazon.
Continue the ordering process and check that the code is working for you!
Also, be sure to use the VAT cashback offer from sony - bringing the price down to £340.64
VAT will be given back off of the full price of the sale I believe. Otherwise it's £348.09.