Thinking about it Rog.... it's a little optimistic as a 4/5 birth.
It's greet for a couple with lots of stuff & it could sleep 3 in the main compartment and one in the single compartment.
It's like a large dome tent with a tunnel to a small end section, the end section has a removable single room in it - (fly sheet/ground sheet) but we have never used that as we just used the space as living space.
Just north of Taunton, there is a comp at with a large display of tents. They had a Kyham quick erect with porch for £200, (ex display) very easy to put up.