Good point (s)
Thanks very much for making me aware of the important details regarding forks that I naively omitted. The stearer tube is a threadless tube, the one with the 'star' thread inserted down the tube etc. The existing steerer length appears to be approximately 210mm. The axle to crown length is a bit of a problem, I passed the existing forks on to a work colleague who said he would have a look at them, but I didn't bother asking for them back, I would guess the axle to crown length to be approximately 450mm, I only say that because I did a bit of research on the web and found some 'suntour' forks that were very similar. Thanks again for your reminder there, much appreciated.