Just to really close this one off and give some help to others. I decided to contact Flight Centre who intimated it wasn't a problem to get first class returns for c£5500 per head provided I stayed a couple of nights in Dubai either going out or coming back. So for c£10500 I've now got myself 2 Forst seats, Lhr-Dubai-Per and BNE-LHR on a mix of EK/QF plus three nights at the Taj in Dubai in a club room. Me happy bunny.