The levy for "taking money from oil producers" does not exist. What the OP is probably referring to is the phasing out of the roundabout renewables' subsidy mechanism whereby renewable energy suppliers received tradable Climate Change Levy Exemption certificates which power consumers could purchase to claim tax breaks against the "Climate Change Levy".

That's just part of the tapering off of subsidies for renewable energies as they become more widespread. Although the amounts can be discussed, renewables are still very much subsidised with public money, and solar is no exception.

I've been a customer of Ecotricity for a while now, and they've been able to consistently improve their mix while keeping prices stable. I don't believe the regulatory environment is working against them, and they don't make that claim either.

I never tried to argue the industry wasn't subsidised (and am a bit perplexed at attracting downvotes for posting a neutral clarification of the legislative changes?), but it's fair to say that plenty of energy firms were objecting about the unanticipated abolition of the Climate Change Levy exemption, not least Drax who saw their earnings forecast hslved.