Actually, the Victor only had it on the left. However, it was close to the centre pedestal just above the 1st pilot's (correct V Bomber term for the LHS occupant) knee. So those co-pilots with gibbon length arms (like me!) could reach and use it.
The V force did have a comprehensive system of co-pilot training and advancement, the culmination of which was the ICC (Intermediate Captain's Course) which in the fianl phase coverted the co-pilot to the LHS where he could fly from then on so long as the captain was RHS qualified as well - as many were.