In April 2019, the DCC consulted on the Migration Testing Approach Document for SMETS1 Services ('MTAD') which covers matters related to migration testing. The consultation also covers consequential amendments to the SEC Variation Testing Approach Documents for SMETS1 Services ('SMETS1 SVTAD'). On 10 June 2019, the DCC concluded on this consultation and submitted these documents to BEIS for approval / re-designation by the Secretary State.