so 'pad fix' aside what causes it?
is the subframe bushes different on that side?
alloy arm shaped differently?
I spent an hour checking with a steel rule and a tape measure - I just can't work out where the 20mm is coming from- both sides look the same.
which leads me to think the subframe bushes are weak on that side - allowing it to drop??
somebody must ruddy know....a £35k car would not have a lean from factory imho