Morgan have known about this for just over 4 weeks and in that time have designed and fitted modifications to 6 of the 7 cars known on TM to have the issue (the 7th was attended to by the owner).
IF on investigation it does turn out to be a design issue or traced to a particular batch of chassis then I've confidence MMC will address it as they did with the bolt on chassis brace ie foc modification via the dealer network.
In the meantime I'll carry on enjoying my 21,000 mile, 2013 M3W