If you have much kit to buy it’s worth checking out Millets, I bought £330 worth of waterproof jacket, walking boots, 2 pairs of trousers, a top, water bottle, first aid kit, rucksack, head torch & probably bits I have forgotten for £160 !!
I bought 12 pairs of socks, 3 pairs of shorts, pyjamas & a top for about £35 on Sports Direct !!
As if my savings were not good enough, I use a site called www.topcashback.co.uk , they work with MANY suppliers to give you money just for shopping, I have made over £200 so far & don’t even use it much, you can even get cashback for ordering a Dominoes ~ just a little ~ but it all adds up & can go into your volunteering fund !! I have put a link on my face book page of the same name as this site !!
If you live in the Bristol area, I highly recommend using www.chequesandchange.co.uk ~ I have used them for years & they pride themselves on having the best exchange rates & there’s no problem selling left over currency back to them.