Dnata handle all EK flights at LHR, currently the cargo is handled by Servisair but when the contract is up again Dnata will take it over.
BHX Dnata do just the Cargo, But it looks like they'll take ramp at LGW and NCL as well as thats where the compition body has the concerns about Swissport/Servisair take over deal.
Interesting few weeks and months ahead.