[Kleftiwallah]

I had to complain about bad emergence of corn on the cob seeds, I recieved replacement seeds but on the slip accompanying the seeds was a  set of company logos. 
Mr Fothergill's,  Johnsons,  D.T.Brown and  Country Value.

So are all these four just the members of a larger company and if so, what is the point of brand allegiance?

Cheers,  Tony.

[Pescador]

A quick search shows that various members of the Fothergill family have been involved since the early 2000s if not before.

[grinling]

mainly down to size of seeds, coating on seeds and how many seeds.

[Goosegirl]

TBH it doesn't surprise me as I've often thought they can't all have their own suppliers. 

[Mr Dog]

I believe there's only a small number of seed houses who supply the vast majority of public outlets.