The Department for Business, Energy & Industrial Strategy (BEIS) closed the scheme in Great Britain to all onshore wind from 13 May 2016. This closure is brought into effect by the Energy Act 2016.
The closure applies to new generating stations and any additional capacity. Operators of generating stations that meet certain criteria may be eligible for one of the five grace periods that are available, meaning that they can apply for accreditation until 31 January 2019.
There is a lot of information regarding the closures and additional information in this months ofgem e-serve which can be found by clicking here.