Mountain warehouse is having 50% off in lots of products. Its valid on-line and in-store.
I usually avoid them due their prices but with the disccount some itmes are quite reasonable quality/price. I bought myslef a backpack that usually costs £60 and I paid £27.https://www.mountainwarehouse.com/ride-25l-hydro-bag-p11343.aspx/charcoal
With suspended back that allows air to flow to avoid sweat.
Rain cover integrated at the bottom
Perfect for me, but as I said there are tons of products.
To get an extra 10% you need to complete a survey:https://www.mountainwarehouse.com/survey/store/receipt
After doing it they will send you an e-mail with a 1-time valid code (on-line and in-store). You supposed to do it after purchasing but probably will work with non-real details (I haven't tried, I had a valid code from last time). If not buy something worth £1, do it and then buy what you really want.