1930's semi
Front ground floor, will be stripping wall with chimney for sound proofing.
Most likely will take walls back to brick and a few echo's when kncocking.
So, is it worth trying to keep the coving, or can I get nice replacements, including the curved bay (will that be hard to plaster??)

hopefully you can see in my photo

You can try and keep the coving, I cannot remember any project I've been on where it has survived walls being hacked off. I do know you can get a template made of whats there and have new coving cast as a replica of the original, last time I was involved on a project where this was done iirc it cost £200 to make the mould and £20 per linear meter to produce install, the last was a few years ago now and I have never seen a curved one done. You would have to presume that it would need to be cast in place. If the coving starts coming away you may well start loosing your ceiling too.

if you want to hack off the chimney wall and keep the coving you could use an angle grinder to cut the plaster below the coving before you start hacking, or you could just take off the coving on that wall and have just that part replaced after you have soundproofed, i see no reason to strip the coving from the whole room, why do you want to start messing with the rest of the room ? it looks fine to me.

Cheers for the replies.

I may try the angle grinder approach.
I'm opening up the wall between front and back rooms and was worried that no matter how delicate I was being, it might end up cracking and falling off.

Here goes nothing

Nice carpet!