About 20 years ago I picked up a Greatcoat and a set of RE City No 5s from a grizzled old FltLt flt eng who retired from Mt Wise. Until last year have probably only worn the coat 2-3 times a year, but its worth it. We get very, very cold winters where I am now and I love going into our compound, collar turned up, segs precariously clicking on the ice and a dusting of snow on my SD hat. A german civilian wryly commented that 'we used to have coats like that, but we wore them with, err, jack boots'.
All the more reason to proudly wear an RAF Great coat just to remind the locals who prevailed in WWII!