Hi All
Thank you very much indeed for all your input - I felt sure the information would be out there, but I didn't really expect so much so quickly!
R got me started by identifying the marque (once I knew what I was looking for, the maker's logo on the tank side is easily identifiable - it is just visible on the jpeg I posted but is crystal clear on the higher res scan I made - I just didn't know what I was looking at!) and he (?) was certainly right in saying that more detailed information would be forthcoming!
Piecing together what Welsh Wizard and Cardan say, I think 1907 has it - at least I can say with confidence something like "is thought to be ...."
Looking at the price new in the 1907 photo Welsh Wizard posted compared with asking price on the 1908 I found at
http://www.carandclassic.co.uk/car/C202771 (hope I inserted that link correctly!) that's not a bad investment even over a century - wouldn't it be nice to find one in a shed?
I'll approach Vintagebike.co.uk for permission to use their 1907 photo.
Cardan, thank you for all the information and the images - am I OK copyright-wise to use the images you posted in the collage? I originally intended it purely for private use, but as people seem to really like the photo, I would be happy to share it here when it's done (if this is the right place for it - or is there a more appropriate forum for it?).
I think I probably have enough information already to do what I set off to do, which is great - but if there is any more information or material out there, I'd be very interested to explore it further.
Thank you all once again - and happy browsing!
I love the internet!!
Cheers - Ian.