I suspect this one need chopping to be sure
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I've just been catching up with my emails and see that Colin Hart had already suggested this in the email!
This has now been dissected by Rachel Terry and proven to be pterodactyla as you (and Colin) suggest.
I wonder if I would have got it correct if Colin's book had been available at the time.
Lat/Lng: 51.254588, -0.315486
OS grid ref: TQ176519