I think the lovely Virginia commented on this post-box when we visited Lechlade a few years ago. It's interesting that it's still painted red. Disused boxes are usually painted black...
However, I could have done without trying to give the lovely Lindsay a potted history of Tractarianism. "So why didn't the just become Roman Catholics?"....
The distinguished Joel has a lovely engraving of Worcester College (his alma mater) with the ruins of Beaumont Palace in the foreground. The last remains were destroyed when Beaumont St (where my office is) was built in 1829.
This (vandalised) plaque is all there is to show that a royal palace was once there.