I'm sure most people know about the Amex Small Business offer valid 6th to 21st Dec. You register your Amex card on the small business website, then spent £10 on your Amex at a small business local that is on the approved list of Amex, you get £5 back as statement credit.
If you are passing through the trafford centre (and many people will be doing at this time of year), just pop by the central desk and purchase a £10 gift card valid at most (not all) outlets. You then should get £5 statement credit as I did today on my Amex account. Easy peasy! Better still if you have multiple Amex cards.
Hope this helps some peeps!