This was in London last year. I've used a mixture but more often than not they are just dumb issue the ticket at a barrier and let you in type car parks. Need t

This was in London last year. I've used a mixture but more often than not they are just dumb issue the ticket at a barrier and let you in type car parks. Need the same ticket to raise the barrier on the way out, after paying. Not set up with automatic license plate reading cameras (ANPR or whatever the UK calls it).