Doctor in Clover
This is a Vincent from about 1948-54. From this side we can't see whether it is a single cylinder Comet or a twin cylinder Rapide. Don't know the make of sidecar.
I think that this is a series C Rapide or Comet 1950-1954. The bike appears to have girdraulic forks rather than Bramptons, dating it as post 1949. Second piece of evidence for making it series C: the seat seems to have two sections like the earlier Feridax model, rather than the single hump of the un-enclosed series D. It is unlikely to be a Black Shadow as it does not seem to have the 5 inch speedo in the centre of the bars, though it is to be noted that by 1966 anything could have happened to the bikes. As a final guess I would say it was a Rapide as the Comets were often seen as not man enough for a sidecar, though both occurances are still around. So to sum up, Vincent Series C, Rapide or Comet.