There are lots of online shops where you can buy items on sale in full season. An example of them are:
... and many more. Also it's easy to find shops in England with sales inside of them. A good way to motivate the people's purchases. In my case, I came across two pair of shoes in a very interesting price.
A pair of plimsolls from Asos, in an original blue high shine, just £18.00
And this pair of grey Oxford style shoes with a lace up on a mini wedge sole. £20.00 from Burton's.