It was definitely after August 1997 (as my work area changed from Huddersfield to Halifax shortly after I collected a brand new P reg company car on 1st August 1997) and late autumn 1999 (which is when I found out I was moving to Suffolk and put the bike in the garage). I cannot be precise but I seem to remember he gave me the bike towards the end of the summer in 1997.
Possibly a 98 actually. 97/8 for those deacal. See Gil_M on here for replacements.