If it is on his property then no that would be a crime ... but Police and Councillors can and should demand it's immediate removal.
This highlights some of the ongoing preoblems with the speed camera industry mentality.
The chap starts to focus on speed issues, because he believes what he is told that speed is a massive and dangerous issue (it's not of course) for road safety.
The Council lowers the speed in the area, for whatever prior reason, then the chap has a problem pulling out. This perfectly illustrates that when you slow traffic you bunch it up.
Place a camera (or cameras thanks to his efforts) and that distracts people from ever considering allowing the chap out as they are far too focused on ensuring the safety of their licences and livelihoods, land lifestyle.
I wonder if we asked him "has it got harder to pull out in the last 2yrs ?", and then researched whether his road has got any busier in recent years, what those answers would be. Since the whole Country has been reducing overall traffic by 6% it is likely that he will have seen less volume, not more.
That by rights ought to have helped him.
Although sparsely spread traffic can prevent people from pulling out than higher speed traffic, as it tends to 'open put more' in flow. That can help people to pull out.
Although the VAS are better they do still have to factor into the whole environment of considerations when travelling.
I recall once I found cops at the end of my driveway and they claimed to be ensuring that traffic was going at the speed limit to help me pull out. I politely but immediately, told them that if I couldn't pull out into a 60mph road then I shouldn't be driving. They left a few minutes later never to be seen there again !
Whilst this chap may have lost some confidence in his ability, it may in part have been brought on by Councillors to reduce the road from the initial 60 to 40. Plus if it is really hard (and some can demand patience to await a gap) why not simply go left and then find a suitable right turn to enable the intended direction ?
People can prefer to be moving than sit stationary for too long.