This policy applies to hydropower, anaerobic digestion, wind and solar PV technologies under 5MW. The FiT lasts between 10 and 25 years, according to the technology. A scheme was also implemented for micro CHP (end of application period on 31 March 2019: https://energysavingtrust.org.uk/renewable-energy/electricity/micro-chp).
For details, refer to the sources below.