I am a regular business class traveller on Emirates. I flew to Perth via Dubai recently. On my return journey picking up the London Heathrow connection at 7.45 AM I was apalled to see that Emirates had a very limited number of X- ray machines for passengers in transit. The huge queue resulted in almost missing the flight and certainly very little time to enjoy the business class lounge facilities. This has become a common reoccurance with all of the flights from Asia and Australia arriving at the same time at Emirates dedicated terminal 3. It is only after complaining to the X ray machine operators about our urgent departure for London that we were advised that the dedicated First/business class X ray and body scan machine could have been used. Emirates really need to sort out the huge passenger backlog and security scan issue for passenger in transit or the airport staff must organise the scan more efficiently and quickly. Either way why do we need a further X ray scan whilst this has already occurred at departure point?