Thanks for the replies and links to the other threads which I have read. We only had an hour and a quarter transfer time (initially it was 45 minutes but fortunately one of the flight times changed) and we were circling Doha for a good 20 minutes or so then seem to have landed and bussed from the furthest point away from the airport, the fact we did not have to go through security was a blessing.

Not sure what was going on in Doha yesterday morning but speaking to others on the flight it would appear a few flights were circling for a while.

As expected, our luggage failed to make it so fingers crossed we get that back this morning