Apologies if this question has been asked before - if so please direct me to it!
Unless I am mistaken, the genuine environmental benefit of encouraging consumers to purchase renewable energy is to demonstrate the demand for renewable energy, driving up the cost and encouraging more investment in renewable generation.
I have just seen data that says that Bulb sources nearly all of its renewable electricity from hydro-electric power (https://bigcleanswitch.org/about/). There is little scope for further development of this type of generation in the UK. Is using hydro almost exclusively a policy for Bulb, and if so how is Bulb contributing to the expansion of renewable energy in the UK?