Again, the IAM advise that an advanced motorist approaches a junction (stop sign, red lights, etc) as if they will have to stop. The car behind you approaching this type of junction should also be preparing to stop as there is a car ahead of them, so should be in no danger of running into the back of you.
A roundabout or a junction marked with a yield sign do not require you to stop, so for these junctions you approach the junction driving normally, then when you have braked sufficiently, change down to an appropriate gear to negotiate the junction if clear, but be prepared to stop if necessary.
I have to admit, braking towards the junction and then engaging the clutch just before the engine cuts out was a bit unnerving at first, but when you get used to it it does not seem strange.