BOU PAX, thanks for that. I am not a regular visitor to Hurn and the 'Master plan' makes sense. I can concur that after the 16:00 Ryanair arrival, the roads surrounding Hurn become choked for no good reason apart from good traffic management.
So what was the ' small old low wing twin' that arrived at 16:20 today? I was North on the A338 as it passed from right to left ahead of me on short final.