Normally mind it means your accounts aren't quite ready. In my experience as a non retired chartered accountant -- grumpy is a lucky bugger in that respect - this is a wheeze whickerh has been noticed and is being used a lot - shorten period by one day and get an extra three months - however Companies House are looking at this very closely. Bridle are not the only company to have used it - believe me
As a non-retired cynic I'd guess that it's being done, by both SD & CM, as the first precaution in an 'tax management' scheme.
If a huge injection of dollars is about to be swilling around they'll both be arranging to minimise any tax issues.
Otherwise I cant see why the pair of them have simultaneously done the same thing but with two totally unconnected companies ... from what I'm told the books on Methven's company could be done in your tea break.