Easter weekend in London

[Otterseatpuffinsdontthey]

Looking for recommendations (Easter weekend) in London. Things to do + nice places to eat.
3 Adults (married couple, early 40's + older female) + 8 year old girl + 4 year old boy.
Main event is ABBA Voyage (Friday).
Trying to find things to suit everyone.
Any opinions on the Taylor Swift bus tour?
Thanks in advance.
Did put this in "Holidays" , but only got one response - Thanks @ Shambles 123!

There are plenty of ideas here. Try Time Out for other ideas nearer the time and for food ideas. Trip advisor is also useful for restaurant reviews.

If you're there on Good Friday then Wintershall do a reenaction of the Passion in Trafalgar Square for free.

The Passion of Jesus | London | Wintershall