That's not true, BPF - the PA28 I usually fly has a document titled 'Approved Aeroplane Flight Manual for the Piper Model PA28-180 prepared in accordance with British civil airworthiness regulations' and is for a range of serial numbers. It's dated 1972.
And the club Firefly has one stamped 'this is the flight manual which forms part of the certificate of airworthiness number XXXXX' then later relabelled 'for aircraft G-XXXX' Date 1989
I keep copies on my iPad, that's why I can check!