Seems like Wizz Air are keen to continue growing its operation at London Gatwick, and want to buy up Thomas Cook slots!
Financial Times - Virgin and Wizz Air eye Thomas Cook’s Gatwick daily slots
Thomas Cook had around 8-10 aircraft based at Gatwick, if Wizz were keen to buy enough slots, they could possibly open a second London base, and expand their UK registered airline further.
They currently have eleven UK registered aircraft based at Luton, but as the airport reaches its 18 million passengers per annum cap, they will need to grow operations from other London airports, if they want to expand further.