Having worked at HEL and LGW for a time, the HEL Servisair Operation will probably go to one of the Scandanavian Handling Agents who already operate elsewhere in Finland. It isnt a big Airside Operation anyway with if I remember SAS & LOT being handled by them (SWP handle Finnair in HEL and its a huge hub).
As already said Servisair at Helsinki has a great part of the airlines flying there. Eg. Norwegian, Turkish Airlines, British Airways, KLM, JAL, AirBaltic, Aeroflot, Belavia, Corendon, LOT, the whole TUI-group including Tuifly, Tuifly Nordic, Thomson, ex Arkefly etc. I might have forgotten some but I think I've made my point clear that Servisair is a big operator in Helsinki nowadays.