Afternoon tea is the ultimate English experience and many restaurants and hotels in London now offer this. However booking well in advance is essential.

You will need to book  The Ritz months in advance ( maybe a year) as it is often fully booked. However it may be easier to book afternoon tea at Claridges and Fortnum and Masons both of which are excellent. It is not cheap expect to pay at least £40 but the experience makes it worthwhile. The staff treat you as if you are royalty and the food is superb. You will be surprising full after having tea in both places and will did not need to eat again that day.

This is an experience you will remember and treasure and a great way to celebrate a special event.