@Shaun *******
, I did pretty much same as Lisa above. I applied at RTE London in Nov for VISA and flew MAN>DXB>BKK with Emirates in Dec.
For VISA application I put my intended flight and ASQ hotel (I had not booked/paid anything at this stage). When my passport was returned with VISA now in it I applied for COE using same flight and ASQ info. Once COE was pre-approved I then booked flight and ASQ and uploaded ticket & ASQ booking to complete COE application. Pretty straightforward, just confusing at the start.