Thanks for the suggestion.  There is a further update that I hadn't got around to posting. The anti-roll drop links were replaced by the dealer when the strut tops were changed out, as they were damaged whilst trying to remove them.  So I was able to rule those out. I removed the anti-roll bar bushes that sit in the front sub-frame, covered them with silicone grease on all surfaces and carefully reassembled, this was much, much easier than was described in the (admittedly, Auris mk1) m