Been in twice for bumps and breaks and seen within 2 hours both times. All brand new and clean. Staff as always in the NHS excellent. Better than George's or St Thomas' for wait times and have everything... more they do. I'd travel the extra 10 mins or so for a walk in to A&E.
My niece was born here and that was also (apparently!) Excellent..
Pharmacy opposite and plenty of food options in the area if your in for a wait. Underground parking also on site, albeit expensive as you'd expect for a central London parking location.
A bit of a wait for urgent care but the right experts will see you. The nurses who see you at first do an excellent job of triaging the priority cases. Excellent doctor's and they will get specialists... more to you if needed.
Excellent facilities and staff mostly very professional and friendly.