Great question — answering as the UphillTech team:
Yes, there are lots of multiday hikes. However because the UK is pretty densely populated there are very few where the stops are not accessible by car. For example most hikes in the South East of the UK you will be in sight of a town most of the time, and you will cross roads and pass through villages often. If you are prepared to sacrifice this requirement then you will find many trails where you will be walking most of the time away from roads and towns, but will be stopping at a village rather than a remote hut. You can still choose to camp, or if you prefer a little 'luxury' there are hostels and B&Bs that you can use instead. If you really want to camp out of the way of civilisation...
Full answer by DJClayworth: https://outdoors.stackexchange.com/a/30168 (CC BY-SA 4.0).
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