This looks like a mid-1980s K's spec. By this time, K's were operating out of a premises in Teignmouth, Devon. The wheels are K's own - they were mounted on "D"-ended axles to try to make quartering easier. Problem is that the plastic wheel centres can go brittle with age, and wobbly wheels aren't unknown.
The biggest weakness is the motor - by this time, K's included the H2M motor in every kit except for their "Milestones" range - even the LMS Garratt kit had the H2M in it. Whilst it had a built-in gear cradle, quality was a bit hit-and-miss as the motors were made on the cheap. If you're really unlucky - as I was back then - the motor will lack proper bearings either on the front of the shaft (where the gear cradle is) or behind, or both. This is a factor in the H2M running hot even when not under load, which then leads to distortion. It's not really a suitable motor for anything heavier than a light shunter.