Henry Piper,thank you for your comments: the tune is used for the Shawforth Dance by Belfagan in Cumbria but they are uncertain as to its origin: the team is over 40 years old and no-one can remember. It is probably not a traditional morris tune but apart from on a page with Arnold Palmer's Bonfire, and unattributed there, I haven't been able to find this version anywhere else.

Derrick, Thank you for your suggestions. The books mentioned are for sale I am loathe to buy the tunebooks if it doesn't have the right version but thank you, anyway.

It is encouraging to find other people think this is a tricky one, too!

Anyone else got any suggestions?