It’s very useful in rural areas where there isn’t an address to go to. People have been rescued off mountains with that app. Sending a string of GPS coordinates is too complicated and it’s hard to see if you’ve made a mistake.
Back to the stream: you wouldn’t recognise them if you don’t closely follow UK politics but every now and then I spot a UK politician or some other dignitary. Theresa May was in the queue earlier - though no doubt these people are put into the queue in Westminster Hall rather being being expected to join the snake.