You've seen Albie's build blog.
Some of the other early bikes were discussed here:
http://www.ukmonster.co.uk/monster/s...Oldest+monster
Initially there was no "official" importer, so bikes were independently imported from Europe. That means early records are sparse. Mine was brought in by Moto Cinelli.
October registration probably puts yours into the first production run with the yellow rear suspension hoop. The '94 bikes production began towards the end of '93 after the bike show [Koln?], though initially the only change I've found is that the suspension hoop was painted bronze to match the frame rather than yellow.