This is definitely no Tamiya marketing gag:
Believe it or not, John Coombs Racing prepared Jaguars for the British Touring Car Championship in the early 60's which they dominated from 1960 to 1962 - drivers were Graham Hill, Roy Salvadori and others, and one of these cars had that very license plate BUY 12 (another team car had BUY 1)- see pictures: