Peppa afternoon tea bus in summer or at Christmas lights?

[Green6]

I have a two and four year old who are Peppa obsessed. I am planning on taking them on the afternoon tea bus in London but can't decide between going in summer or waiting until Christmas for the Christmas lights one.
Has anyone done either (or both even)?

Go now. The 4 year old may well grow out of PP by Christmas, especially if she’s starting school in Sept.

Thanks it's a very good point