The Hornby TT:120 BR Intercity Mk3 Tourist Standard Open coach, model number TT4027C, is part of the BR Intercity Mk3 Tourist Standard Open range, specifically the 42196 variant from Era 8. This coach is designed for the TT:120 scale model railway. Mk3 coaches are 75ft (23m) long, offering greater capacity than older models and featuring disk brakes with wheel slip protection for faster deceleration. They were first used with the HST prototype in 1972 and entered service in 1975. This model represents rolling stock used during the BR Sectorisation period when the BR 'Blue' livery was phased out and the Intercity brand was relaunched.