Thanks for the helpful suggestions guys.

With the help of a friend I managed to get the front end off the ground and, guess what - the handlebars had to be dragged from left to right indicating either lack of lubrication or an over-tightened bearing situation!!!

I've now got to find time to get THAT done, apart from all the other life stuff..

In case I need to replace the taper roller head races, does anyone know the generic bearing number so I can order them up from Simply Bearings beforehand?...
Thanks again everyone.
Ed