Originally Posted by
Scillybear
Clarification would be useful because it surely applies to any kind of transit trip (Heathrow to Gatwick etc..).
If you look at (e.g.) the England Statutory Instrument, it is clear that self isolation is a process that exists between arrival into England and resuming active life in England. Leaving England removes the requirement to self isolate, that is specifically in the SI, and I don't think it could be any clearer that this permitted, so long as it is done "directly".
More details in the main thread in the Covid forum.