I am not surprised this has attracted the attention of the competition authorities. You may recall that Swissport had to sell the Servisair handling business at LGW at the time of Swissport`s merger with Servisair, as it was felt the combined business was in too strong a position.
So then Aviator buys the Servisair operation, BA dump Swissport and go to Aviator, Swissport decide to leave LGW, and Aviator takes over the business. So Aviator are now in the same position as Swissport + Servisair were originally. The only difference at LGW is that there is now extra competition from Airline Services and dnata, which may save Aviator from having to give up some of its business.
Will be interesting to see how it plays out.