Originally Posted by Point_Chaser
LHR gate agents are very good at this! They usually make a clear announcement about this, and sometimes I've even experienced them checking the BP stubs to see that people board in the order they announce.
I agree, at LHR it works very well and they always make very clear announcements about who is allowed to board at what time, always starting with C and *G passengers.
They have checked my BP as well a few times to see I'm actually entitled to board before everybody else.