Thank you Aric.
I will be getting a soundbar or soundbase in any case, so would this allow the workaround?
If so, can you recommend a soundbar which will allow this?
Also you say "and connecting both the TV and the headphones to the TV using the optical output".
What do you mean by connect the tv to the tv?
Hello again, I got a better answer from Samsung for free.
Just connect my headphones to the optical output through an optical/analogue converter, and my family can still listen to the TV speakers which won't be muted.
So no external speaker required.