EK in the UK
If you have a look on the EK website for their UK operation you would see there are 5 x LHR-DXB, 3 x LGW-DXB, 3 x MAN-DXB, 2 x BHX-DXB, 2 x GLA-DXB and 1 x NCL-DXB per day.
That's a lot of seats.
The current venture with BA routes passengers to Australia from the UK to Heathrow and then onwards. I wouldn't expect that to happen once the EK business venture starts.