Thank you for the suggestions. I had a further play on the site with various options and the best value was to just keep MEL-DXB-LHR all in business. Depending on how busy the MEL-DXB sector is, I am sure I can pop down to economy and my OH can pop up to see me for a cheeky glass of fizz (as long as we don't take the mickey; it's a pet hate of mine).