Let me look into this Paul.
Edited to add:
How about a weekend of 24th-26th of April?
The weather should (hopefully) be warm enough by then to enjoy a beer garden, etc.
The weekend of 1st-4th May is a bank holiday, so likely the area will be quite crowded.
I personally can’t do much before then.
If it is a go ahead, then perhaps a fresh open invite thread should be started?