Sort:  

Awesome! I bought mine in London (probably paid extra). Tell me what you think once you test it. I'd only add a chlorine tablet if you take water from weird places.

Thanks for the advice. I’m going along the pennine way so the water will be from high up streams or reservoirs, do you think these sources will need a tab?

Hmmm good question. I guess you should be fine on most cases, unless there's cattle around or something. The filter is pretty potent.