maybe even Belfast-City or Waterford perhaps?
Also BBC article just appeared:
BBC News - Flybe picks up flights between Newquay and Southend
and flights begin 17th May until 27th September as this article with Flybe marketing writes.
Flybe resurrects Southend flights after easyJet 'left passengers in the lurch' | The Cornishman
As these flights start the same date as the Birmingham flights from NQY does this imply a NQY based aircraft and therefore no extra routes from SEN?