pax britanica
The Doves operated at the same time as the Princes, & then took over completely when the Princes were retired. This would have been from the mid, or late, 1950s until the Princes went during the late '60s. I think the Doves were themselves retired somewhere near the end of the 70s. That is when the 748s took over.
If my memory serves me right the Princes were G-AMKW,X & Y. The Doves were more numerous & included G-ANOV, OW, UT, UU , UV , G-ALVS, G-ALFT. Although I'm not totally certain of this !