Re: legal target
The latest strike price for offshore is £57.50 per MWh.
A large part of the electricty in the UK comes from Nuclear which has a current strike price for Hinkley of £92.50 per MWh.
The reason that Offshore wind (and renewables in general) have come down in price so much is due to initial subsidies that allowed scalability and reduced the risk. This has been shown to be paying off with major solar projects and wind often needing no subsidy at all.
The benefits, of course, are carbon free electricity generation, unlimited supply of the source energy and non-reliance on imports.
The push towards expanding renewables was probably worth it, I'd say.