From those words I infer you're not running this as a business (i.e. no VAT reports to file etc.) ?
Most things out there are targeted at businesses, so there will probably be a bunch of features you'll find you need to ignore.
Maybe a combination of an Excel spreadsheet and Evernote/Dropbox/Whatever for storing your receipts would suffice for your humble needs ?
Just don't forget to comply with HMRC guidelines for scanning receipts
P.S. never used it, but just found on Googoo... maybe this app would be of interest ?
http://www.earnestapp.com/ ... same goes for
www.quickfile.co.uk