It looks like they've had a complete replacement job rather than a cover up. If they were to cut back the extended fascias, there would be nothing there behind so they would have to get new timber fascia and new soffit installed, then paint the fascia black and the soffit white so even if it's done, the bit will look 'new' compared to your exisitng timber fascias and soffits so you would still see how far their fascias used to come over.
We've sometimes 'gone over' by a few inches when there are AIB asbestos insulated boards, the sectional join can sometimes be a little over your side but even then the fascia stays where it should be.
I'll be completely honest with you in saying it's not worth the hassle and worry for you sorting all this out. If the fitters told you to get lost then we all know it's not going to get done whatever happens.
The only saving grace of them going over is that when you get your soffits done (assuming your terrace is the usual 5.2 to 5.4m width, your fitter will only have to use 2 lengths of fascia/soffit for front and back
Instead of spending on court orders etc spend the money on new soffits and fascias instead. Not the answer you wanted but the amount of stress neighbourly disputes cause, you may as well just get yours done
We've sometimes 'gone over' by a few inches when there are AIB asbestos insulated boards, the sectional join can sometimes be a little over your side but even then the fascia stays where it should be.
I'll be completely honest with you in saying it's not worth the hassle and worry for you sorting all this out. If the fitters told you to get lost then we all know it's not going to get done whatever happens.
The only saving grace of them going over is that when you get your soffits done (assuming your terrace is the usual 5.2 to 5.4m width, your fitter will only have to use 2 lengths of fascia/soffit for front and back
Instead of spending on court orders etc spend the money on new soffits and fascias instead. Not the answer you wanted but the amount of stress neighbourly disputes cause, you may as well just get yours done