Last Thursday I beat my wife through immigration at Bristol airport. She at the e-gate me in the 'other passport' queue!
It seems it has become more and more popular, and people are choosing the normal queue over the e-gate! because it's quicker.
Funny you should write that. I have a very similar experience at Bristol airport. I've given up trying to use the e-gates now, as inevitably I will be delayed and it's much quicker to go via the "traditional" route.