Astir 8, thanks for those references.
I have now had a reply from the Crossley group. It seems that it is likely the vehicle in the photos could be a Crossley. However, the front wheel arrangement is just as confusing for the chap that answered as it is for us. He has never seen, or heard, of such an arrangement before.
Have now emailed a copy of the first photo which shows a little more detail of the front of the tender and am hoping he might be able to supply more information after seeing that.