As mentioned, the usual cause is the pinch point wearing through because the pinch bolt and nut wasn't changed; this part:
https://www.dmgrs.co.uk/products/rov...930-genuine-mg
We have quality Front Lower Arms in stock, failures seem very few and far between. Give ours a try:
https://www.dmgrs.co.uk/search?type=...ront+lower+arm
Not the cheapest, but they come with the bush already fitted and seem to last well. They won't help if the pinch point is worn, though.