This is not a purely “`British watch brand” question, but it is one I have thought about and discussed a fare deal of late. Is there a move back towards smaller watch sizes ? Personally I have never been a fan of 45mm plus cases and feel some where between 36 ( for example older model Rolex Explorer) and 40mm is the perfect size. The newly relaunched British brand came to market with a great 38 mm range.
Here is a piece from Monochrome Watches discussing the relative merits of a smaller Omega Planet Ocean.