After a number of months of anticipation, the Department of Energy and Climate Change (DECC) has announced that the domestic RHI scheme is now live and ready for applications. You can see the press release here: https://www.gov.uk/government/news/new-scheme-offers-cash-incentive-to-households-using-renewable-heating-systems-in-their-homes
The application process on the Ofgem website is also live and it seems ready to receive applications. You will find out more here: https://www.ofgem.gov.uk/environmental-programmes/domestic-renewable-heat-incentive/about-domestic-renewable-heat-incentive
From what I can see, the policy or process has not changed from what has been disclosed previously. The rate (18.8p per kWH generated for ground source heat pumps) remains as discussed previously.
I am just waiting on our green deal assessment and EPC before completing our application. It will be interesting to see how long it takes to process. Watch this space!