Moneysavingexpert.com and navigating to the credit card section might be useful

There's a list of the top cashback cards there I believe - depends how often you'll be using it I spose. Personally, I like the added cover a credit card gives, and the fact that it isn't linked to my main bank account when purchasing online....

+1
I was very glad i used my credit card to book my Zoom flights to Canada earlier this year. When Zoom went bust I got my money back without any hassle at all.