OP
Tricksy
For the house - new CU - a EIC as you have done
For the garage - if you have not done any work then EICR if you want to do an inspection on that - but if the garage is part of the house circuit (no CU in garage) then the garage needs to go on the House EIC as well - but it would be better to have a small CU in the garage as well for safety reasons
Thanks Nicholas. The garage does have its own CU and it all checks out ok.