Something of a side topic, but if you're a hiker, camper, survivalist, prepper, ex-Boy Scout etc you may now be in breach of anti-terrorism laws and liable for a fine or imprisonment. As of 1st October last year a number of new substances became illegal to own without a license including hexamine, in any concentration which includes the solid fuel tablets that have been a staple of light weight military issue style camping stoves since WWII. The same law also covers hydrochloric acid above 15%,
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https://www.gov.uk/government/publications/licensing-for-home-users-of-explosives-precursors/licensing-for-home-users-of-poisons-and-explosive-precursors#fn:1
This is another law the government has brought in without any apparent effort to make people aware of it, or the fact that they may be breaching it quite innocently. A similar thing happened with the changes to road traffic law giving pedestrians right of way at junctions with a give way but no designated pedestrian crossing, including roundabouts, neither drivers nor pedestrians are properly informed about this.