It happens to civvies too.
About 20 years ago I had two beautiful suits built by a little tailor in the Dales [two because one seemed so reasonably priced].
Each was worn about twice a year, then once, then not at all.
They shrunk beyond belief in a clean wardrobe in a modern house in a dry part of the country.
They went to a charity shop last year.
There is something sinister happening in our wardrobes, more immediately consequential than Brexit.