In a tweet the SOU MD stated that 2,002,767 passengers used the airport in 2018, so they held on to 2mppa by the skin of their teeth!
It looks like it will be quite an achievement to manage the same in 2019 though, given the loss of KLM from March onwards and the continued question marks around Lolo.
He also tweeted, in reply to a question about growth in pax numbers "with a longer runway next year there will certainly be more choice for passengers."
I'd imagine we'll see the runway extension being built this winter and hopefully a return to growth in 2020.