She is drawn to potholes like a moth to the moon, but Im assured that the wobble isn't a result of potholing or curbing. We have purchased many an alloy rim over the years and a drivers door, which was left slightly open by the roadside, to be sucked open and removed by a concrete lorry... I could go on.......

I once had what I was convinced was a wheel balance problem with my Ford Capri. I had the wheel balancing carried out at many different tyre shops but the problem wasn't solved. It was like your problem, OP - I always thought the wheel balance problem had been solved and, of course, always hoped that it had. But at various lengths of time afterwards it was always clear that it hadn't.

I took the car into my local trusted independent garage when I was clearly getting nowhere with the repeated wheel balancing. They checked everything on the front end and recommended changing some of the rubber bushes. This they did and problem solved! From the way in which the car was behaving I would never have believed that the problem was being caused by worn rubber bushes but it was!

I always used to find it helpful with wheel balancing to actually get the wheels balanced on the car. I'm not sure whether anyone actually still has the necessary equipment to be able to do this these days but it might possibly be worth your while to have a phone around and see whether or not it's still possible to obtain this service.

2 years later and the wobble problem persists, despite 4 brand new, matching tyres last month.

No idea if there is a connection, but when reversing (on full left lock) to get out of our drive, the car knocks a couple of times during the 10M reverse. Id guess from the offside rear, but cant be sure. Possibly a perished bush somewhere, but no mention on MOT;s...

Anywhere below 46mph and above 55mph, its fine. A pain if stuck in a 50mph zone..

Baffled......

I get the feeling its not a wheel problem but possibly week or damaged wheel studs/bolts onto hub- possibly even hub as well, could be when pressure is applied to the Bolts/nuts the thread/s give causing a thread to slip so it appears the wheel is out of balance

I have known it to happen on an old Escort years ago and the hub had to be replaced with the Bolts. but it is just a thought

Apart from what has been said could even be a ball joint or as galaxy mentioned bushes

Edited by bolt on 05/03/2021 at 17:37

No idea if there is a connection, but when reversing (on full left lock) to get out of our drive, the car knocks a couple of times during the 10M reverse. Id guess from the offside rear, but cant be sure. Possibly a perished bush somewhere, but no mention on MOT;s...

After many years driving 205s I was quite used to the gentle 'knock' when reversing, caused by the pads reversing within the caliper. Don't know if that is your explanation ?