Supply partners for Derril water solar farm and Whitelaw Brae Wind Farm

I've just noticed today that Whitelaw Brae Wind Farm has some of the biggest electricity companies in the UK as supply partners such as British Gas, Eon, etc whereas Derril water which I'm invested in only has Coop energy? Will Derril water have similar supply partners by the time it is engerised as at the moment I have very little option to shop around to get the best deal while also receiving payments