Ok the 3 known and existing UK transporter bridges are:-
1. Newport, South Wales. Still takes cars
2. Middlesborough
3. Warrington

I also have seen one in Rochefort (south of La Rochelle)

Ian
2011 Plus 4
Wild Mogs Reims 2019, Goodwood 2018, Isle of Man 2017, Carried on to Caramulo" 2016