The first thing to look out for is the fact that we, here, in England are extremely keen on thermometers. Willard will see them everywhere. Here are just a few examples:
Willard might notice that thermometers outside of churches even a mile apart are giving entirely different temperatures (in non-F units too which could confuse him) and that should give him more ammunition for his village heat islands project.
He may also like to go to Fenny Drayton in Leicestershire. This is the geographical centre of England and therefore the place where the Central England temperature series is recorded. I am sure he will find the thermometer outside the church where they are traditionally placed in England.
Having visited Central England, it is essential that Willard takes a trip to see the House Of Lords and play spot the Monckton. That's right. He isn't there.
So with a little preparation, Willard should enjoy his trip. And if he keeps his mouth shut at the talks, he might even manage to look intelligent too.