Leahy informed them their flight processing system did not have a dedicated backup due to Nats being in the midst of a “complete overhaul of its systems” and because the amount of data it keeps meant duplicating it would cost “vast amounts”.
Rolfe ruled out a cyber-attack, which was initially suspected, saying he “believes we’ve never seen an incident happen more than once, so this will be something different that we’ve never seen in 50 years of operation”.
Oh my goodness, that's terrifying! How is it that bad? They sound like they're just winging it and hoping for the best, and this is an air traffic control system!