Thank you all for your swift responses!
and thank you all for welcoming me
Jebber - I did go on the trail of the Dorset Honeybornes some time ago but haven't managed to connect them to my lot despite a lot of similar names! The Henery you mention married and died in Dorset so it can't be him.
Capetown - Thornbury roots has been a great help to me in my research, Henry was the father of the John you mention but as he didn't survive to the first census I'm not sure what his occupation was. Thornbury roots doesn't mention any Honeybornes as far back as the Henry I'm looking for apart from the family gravestone. I went to Thornbury last year and the church records don't have any more info about him unfortunately.
mazi (Mike) - I did find the marriage record that you mention and as you say the dates fit in nicely but I haven't been able to prove it. I phoned the Herefordshire history society but the original parish record has almost no information, just the name of the bride and "of this parish", the name of the groom and the names of the witnesses - no fathers names or addresses
I traced a Martha Arnold to a family in Rockhampton which is very close to Thornbury so she does seem a strong possibility but I don't know what she'd be doing in Bromyard (it's quite a way from Thornbury for those times). Also I still have no clue as to where Henry came from and why he might be in Bromyard.
Thank you .....