Though technically part of the same company since the early Fifties, when Triumph was sold to BSA, there were intense rivalries between the two factories. Their team riders may have enjoyed friendly interaction with each other on a personal basis, but a distinct ‘them and us’ was the feeling further up the scale. John Giles fell foul of this attitude when he dared slot his Triumph engine into a BSA frame and race it in a scramble. Triumph boss Edward Turner was less than pleased so Giles was cast into the wilderness for a year as punishment. Ironic really, when the factories had had their hand forced to try just such a combination officially.