Final preparations

The cap will be put on the windmill tomorrow morning, at 9 am UK time or more likely between 10 and 12. Two sails will be attached to the cap when it goes up.
Friends of Upminster Windmill
The whole thing can be followed online even now.
Live feed

One of my neighbours is on the committee of the Friends and he told me only last week that with the coronavirus restrictions, the Dutch windmill engineer would not be able to come before the end of the year, so this is exciting news. 

The extra is a familiar building.