Foundry used to do a triad set called British Uniform, but I'm not sure they actually produce it anymore. It was part of the WW2 range which they stopped making. Though I have seen some of the discontinued ranges at shows or maybe from Foundry themselves still if you drop them a line. I would add though I have tried some of their WW2 colours and some are good and some a little off (IMO). I'm not sure how the British Uniform stands upto Vallejo colours for British Uniform. I must add I use mainly Foundry and Vallejo paints now. Vallejo tend to be more matt in finish (again in IMO), though of course once the varnish is on it tends not to matter.
You could take a look at Artizan's website. They have painting guides for the main WW2 participants by Mick Farnsworth and he uses Vallejo colours.
Of course there is the argument/theory that due to different manufacturers/dyes/wear and tear there would not be a common uniform colour across a unit/army or for that matter on the individual components worn by an person in the uniform. Which is borne out by period colour photos. So mixing colours and having different variations is not really a problem. But that comes down to personal choice/preference of the painter.