St Matthew's looks like this...
It's a large roomy building. Here's the chancel.
According to a website I browsed there's a secret tunnel leading from the church to the Woolpack Inn across the road. Who dug it? Smugglers, of course. Russell Thorndike- who wrote the Dr Syn books- wasn't diverging too far from the known facts when he posited a clergyman as the leader of a Romney Marsh smuggling gang.