Only thing stopping it being a '5' was the slightly chaotic queuing system outside in the rain. Once inside, everything was really good. The vastness of the galleries plus making pre-booking compulsory means everyone is nicely spaced out (distance-wise !) and so very Covid regs compliant. You can follow a variety of trails keeping to one-way flows. Plenty of staff available to guide. And then there's the awesome paintings themselves - so many great works - Monet, Constable, Turner etc. And it's free.The 'Sin' Exhibition was a little limp and over-priced coffees