Thanks for all tour contributions..
The main reason for my water enquiry is that I haven't walked more than a marathon (26 miles) in a day before and I'm going to try and walk as much of the Test way as I can in one / two days which is 44 miles. Walking the marathon was an organised event for Alzheimers so there was no issues with food or water.. I did carry 2l with me to share with my Wife.. On a daily we generally carry too much, 10mile walk in Winter we would carry 2l with extra in the car but in the heat over 14deg I carry 2x 1l bladder and 2x700ml bottles with extra in the car, we always come back with about half.. We also don't eat much other than an apple or such.. Food wise I was hoping to survive on oat bars and beans in a re-sealable pot.
Any recommendations for a cheap water purifier ? I was looking through 'Walking Magazine' today and it's not difficult to spend over £100 and very few £30 or under.. I notice too that some are buy and use and others need extra filters or tablets etc..