Taxi’s definitely prefer pick up drop off at A & E I’m not sure if the hospital welcome people through A & E who wish to transit to TKT, I know it can be done, you’re quite right about slow traffic but at that time it’s fairly easy, around visiting hours is when the fun starts
I can confirm that taxis whilst can’t really stop they do drop people at the Millennium wing on the car park road at the back any many people including staff have been known to hop out and head left to the level entry easy acess TK tower 😉 level 6 iirc at that entrance, picking up though is a...