It can unfortunately vary by council / area. Some will do it but charge quite a lot for the service. Others simply don't engage.
If you end up in that camp the other possibility is doing a search on Napit's website for someone offering third party certification (TPC) in the hope there's someone local who is willing to discuss plans, inspect first fix, 2nd fix and do the required paperwork.
A quick glance suggests there are a few signed up to do TPC in your area. But you may find that not everyone conned into buying signed up to do TPC is actually willing to do it.