I don't want to jump the gun on this. I'm surprised one of BArbs Legacy Pax hasn't reported this, cos of course its annoying.
It could be this was just one nasty enforcer, perhaps a transphobe or other bigot.
OTOH as long as things move the same way as MXP, I can't see Brits being excluded from the eGates considering a whole load of TCNs are eligible to use them.