Thanks Jonathan and Rob. I was under the impression that it also covered the interior albeit quite a number of changes were allowable if it didn't affect the fabric of the building for want of a better phrase. When we first moved in there was a heritage officer (no longer available) whom indicated if we were to make changes (very general conversation at the time ) it was more likely we'd get approval if we didn't "replicate" what would have been there originally so as to avoid confusion as to what was original to the building.

Listed building status covers the whole house, not just the outside. See here:- Historic England. That means any structural work inside is also curtailed by listed building consent. So, yes you do need permission. The extent of the Listed Building status is basically this:- ( Seek advice from your local planning officer )

Extent of protection

The list entry will identify the principal building or buildings that are listed. These will be identified by the formal list entry and not the narrative description, unless there is ambiguity in the list. The whole of any principal building is listed, including the interior.

Thanks Hugh, I guess there's no avoiding it then :( It would be nice if the LPO was ever available to speak to but I guess it might just be quicker to apply formally

Thanks Jonathan, I'm fine with decorative changes etc but is this classed as a decorative change being a fixture of the house? I'm pretty sure I can't alter walls in any way so maybe that's the answer??

It is as stated, not a decorative change. Decorative changes are painting, wallpapering, tiling etc, The listed building status prevents anything in fact that alters the structure.

The LPO often have problems with Kitchens being moved into other rooms, simply because that is not where they belonged in the first instance. Likewise with bathrooms being moved upstairs, as often they were not there at all.

The frontage and facade have different rulings for windows, doors, porches, guttering etc but, as far as i am aware this has nothing to do with what you can see inside rooms from the outside.

Thanks all, I changed my internet search and removed the words "listed building" and a few articles say I may (or may not!!) require consent for a listed building. I don't plan on making changes to the stack/flue (is likely to be for decorative purposes only :)) but I still think I need to apply.