The last of this departed with the US majors to Heathrow in 2008. Gatwick remains a leisure airfield with only Emirates and Qatar as major long haul business carriers, with BA and Virgin operating primarily sun and leisure routes.
QR/EK can also be argued to be leisure routes. Remember a high percentage of this traffic will depart to sunnier climates as well as VFR traffic. But I agree, two of the only long haul business destinations.