An astronomical observation

[David]

 Susan Fox-Davis wrote:

> Draco is one of the north polar constellations;  as such, Draco is
> always there over Britain!

Yes, but the head is the brightest part (gamma, mag 2.2 and a couple 
of third magnitude stars), lies IIRC between 17hRA and 18hRA and 
50ºDec and 60ºDec which therefore pass *directly* overhead between 
50ºlat and 60ºlat roughly between 11pm and midnight local time on 
that date, or midnight and 1am daylight saving time (such as BST).

David