@Justonedayatatime11 yes it was lovely.
Even better than normal as it's actually quite a small space so having empty tables was great. Cakes epic! The piano player was wonderful.
But the best bit was... we walked through Green Park down to the Mall and along to Buckingham Palace. It was deserted!
I worked in London for 20 years and it's just gobsmacking to see it without any tourists at all. Once in a lifetime.
Do it - you can literally walk up to the gates of the palace on your own. I was in shock - it was like having a view/private tour that not even visiting dignitaries get. Amazing.