Thanks for that Barry, and the link to the Tamworth Club - I enjoyed browsing around there.
If I were trying to hunt down 2I/Borisov (aka C4/2109 Borisov) I would start off with the
JPL Horizons website as it has always been accurtae when I have been imaging NEO's and the fainter moons of Uranus and Neptune.
Cheers
Dennis