What sources? The natural place to look is the live departure board for accuracy and for whatever reason SEN has turned theirs off. Airports need deep pockets at the moment so Southend losing less money is no endorsement of future recovery or returning to profit. If the SEN plan is to wait again for other airports to fill up they might have a long wait.
Events have unfortunately conspired against Southend. Maybe more so than other London Airports so it pains me to say I think Southend’s recovery will be the slowest out of the 6 London Airports to get back to where it was even though they need the least number of flights.