This is for 2019 and will be revised for the next year.
If you have little ones and they are up early on Xmas morning (and what child isn’t? 🙂) and the weather is clear then point them towards the heavens at around 6.50 or so (see below).
With a couple of minutes’ patience scanning the sky to the south and southwest and a little luck they’ll see Santa’s sleigh heading home!
London: 6.52, Birmingham: 6.54, Cornwall 6.56.
(it is, of course, the International Space Station)