Sussex wrote:
I like the bit,
Taxi and minicab drivers have been told how to identify these animals, so it is important that your guide dog wears its harness or, if you have one of the other assistance dogs, that it wears a jacket showing the name of the charity which has trained it. If you have an identification card for your dog, please carry it with you.Now how many of the 200,000 plus licensed drivers, have been told anything of the sort?

Local Authorities have been issuing a government book ,Assistance dogs in taxis, it has also been available from department of transport, its in there.
bet most know about medical exemptions, but we will choose not to read the rest.
Geoff