Originally Posted by
continentalclub
I've heard others say that too, although personally I find the BD ones board-hard with a nasty ridge at the leading edge of the seat squab

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Where on earth did you learn a phrase like "seat squab".
Sounds like a term an undertaker, or perhaps a school tailor with roving hands (the therapy bill was extensive...!) would use.
I wonder where they got the idea for "a nasty ridge at the leading edge" from....?