UK Feed in Tariff rates (FIT) are based on the RPI inflation rate for December which is released in January.
The RPI rate for December 2023 has just been released at 5.2% so by my calculations it gives a new FIT rate as below:
Generation rate was 68.3p so now 71.85p per kWh generated
Export rate was 4.82p so now 5.07p per kWh exported