Oops,mistake whilst writing.Somehow sent message before written properly.
Okay.
My house-mates boyfriend was on the flight and has told me direct what happened.
They were late getting off the ground due to a technical problem (?) and then approx 30 mins into the flight,they were told that there was a fire warning light that had come on,no fire,just a light and that they were going back to Jhb for safety reasons.
On landing they were escourted by the fire trucks to a parking bay and everyone exited like normal people.
They were just refused hotel accomadation in Jhb and put on a later flight to Lusaka.
Hope that clears that up.