"Ah, what fine weather! Spot prices must be low... we should do a load of laundry!"
[0] https://www.thesun.co.uk/news/12658715/prince-charles-bans-w... (I'm very very sorry that all I could find was a Sun article.)
It's basically someone realising one of the clauses in their deed is worded perhaps a bit too broadly and are worried if it will be enforced. As a result, they are asking for legal advice on an internet forum and various randos are chipping in with half stories.
In essence, anything your neighbors can see is highly restricted in what you can do.
And of course, many places don't have this and people have small properties so they park on the slim slice of property in front of their home.