I would be there in a heartbeat! I love London, but one can only take so much. A month in the UK would be just a total dream. My mom is quite the Anglophile and she spent several weeks exploring the small haunts , many years ago. I would love to do the same and would be horseback as much as possible (given my husband has zero interest in horses)
I went to Scotland, years ago, and wanted to do "pony trekking" outside of Oban, but we happened to be there on a holiday (in spring) and they were not operating that day. We were only in Scotland about 5 days, out of a three week stay mostly in London.