As far as I remember the Cradley announcer always pronounced him as Strawn as well, so that's what he's always been in my head.
Norman rode for Newport in the very first meeting I saw back in 1968, but my main memory of him was getting his autograph a couple of years later when he was a Cheetah (I think). Beautifully written, taking his time, with the full name, making a stark contrast to most riders autographs that I managed to acquire.
RIP