Originally Posted by
tfjim
LHR is quite possibly the worst place to overnight if you don't have ePassport or Fast Track. Depending on your circumstances (non-J travel) you will potentially be stuck waiting in line for much, much longer than you would like.
The UK government will later today announce its intent to allow "low risk" countries to use the e-gates, and I'm almost certain that means US, Canadian and many other Commonwealth citizens. I'm not sure of timing, but my guess is that this will be from the end of 2020.