The Thornborough Henges have three alleged Orion links, so far as I'm aware.
1. The henges are arranged in a bent line, very like (perhaps 5% error) the belt stars (and like the Giza pyramids)
2. The Time Flyers programme (Nov 2003) had Jan Harding (the Newcastle Uni archeologist) and Clive Ruggles (the Leicester Uni astro-archaeologist) agreeing over how remarkable it was that Orion was framed by the south-south-west gap in the Central Henge in mid August. (Were they talking about late at night? Or about how things were 4 or 5,000 years ago?) I didn't get what they were saying (extra info seemed needed) but was impressed by how much they were impressed.
3. George Chaplin (Thornborough campaigner) recently reported Newcastle Uni (perhaps Jan Harding again) had noted that Thornborough Cursus (directly under the Central Henge) seemed to be pointing at where Orion used to set 5,000 years ago.
(All a bit third hand, but it may be worth pursuing.)
Gerry