Part O has come into force on the 15th last month. Can OBD/OBES/Hevacomp be used to assess overheating?
Part L seems to be in the bag. Part O, CIBSE TM59 would be a good one to have. I can see a lot of architects wanting to have quick feedback when designing.... and a lot of engineers not wanting to update the model manually everytime.
A big cost advantage and selling point if the OBD user doesn't have to have an additional subscription just for Part O, TM59.