I may have been a bit premature
Turned out they needed some extra information for the forms, so they didn't go off to the CC until 21st and my solicitor is on holiday for the whole of February. I rang the Commission today to try and get an estimate of what the backlog is and it's about three months
so it looks like my roofer will not be getting started in March after all. The very helpful lady I spoke to did kindly say she'd try and speed things up for me when I explained why I'd rung, so fingers crossed - apparently as long as the maps are up to scratch it should go smoothly and once it's gone from the CC to the ROS it only takes a week, so she's found the paperwork and said she'd make sure it got to the map checking people ASAP. Hopefully since it's been prepared by solicitors it should be fine.