Came across these and seem like a good deal so thought I would share the discovery. They're £7 for 50 in my local camping and outdoors shop so £3 for 100 seems good to me. They don't taste as bad as the life systems and others I have used and 20L tablets are there for the same price
100 OASIS WATER PURIFICATION TABLETS (10 x loose strips in polybag) https://www.amazon.co.uk/dp/B00LJTGIW0/ref=cm_sw_r_awd_0ieHvb80G890J
100 OASIS WATER PURIFICATION TABLETS (10 x loose strips in polybag) https://www.amazon.co.uk/dp/B00LJTGIW0/ref=cm_sw_r_awd_0ieHvb80G890J
