When all those border control programs are on TV there are loads of customs people checking for contraband, foods, gifts over value etc.
When we passed through Manchester yesterday there were three tunnels alongside each other, nothing to declare and red channel. But no staff at all just those clear corridors with an automatic door at each side.
Are there people monitoring it somewhere in a room
or else surely people can just walk through.
I took my Mum's case through as it was heavy for her and it alarmed and shut me in but then opened and no one came. (I was going EU to UK and had nothing to declare.