It is,they sponsored him back then. If you zoom in on the photo of him riding the bike you can see the Tange Prestige Ultrastrong sticker on the seatube but above it i'm guessing that will be a Langsett cycles bike shop sticker which will be a nightmare to find, that'll have my retrobike ocd going overtime trying to get one lol
Im fairly close to them so would be happy to collect and post a decal on if that helped.
Ive also got a friend (who now lives abroad) who is Steve’s best mate. When he comes back to the UK he borrows Steves bikes. Maybe we could sort him signing it or some pics ?