Beryl had a Fastback Time Trial Special built by the Specialist Bicycle Development Unit at the end of the 1982 season. It was repainted several times by Raleigh and ended up repainted by Bob Jackson as seen in 1993....sorry it's not the lo-pro
With a 24” front wheel it pretty normal to have a clearence that large even on my Bates so as not to upset the geometry of the frame & your personal measurements to much