I was also thinking the same about Ryanair and their Brexit threat. Just shows that Ryanair is all huff and puff and full of bull.
The Stobart statement says
This five-year agreement, extendable to ten, and agreed on our standard commercial terms...
So, depends on the nature of the contract and who's taking the risk.
The Stobart statement also says:
As a result, Ryanair will operate three planes out of Stobart Group's London Southend Airport from Summer 2019, providing 13 routes to eight European countries, and will include six new destinations.
Can somebody summarise where the crossover with the current Easy and Stobart routes is?