As it's expired by 2 months then you will need a Course Completion Certificate SRG 1119D to say that training or an assessment of it has been made by an ATO (RF) Then you will need a Form SRG 2199 to record the test and the fact you have signed the rating.
If we used the EASA form given in AMC 1 to Appendix 7 it would be quite straight forward. One of the objectives behind EASA claims it is to avoid duplication!