That's what I thought but can see a North Flying Metro has landed at CWL (or due in this evening) from AAL as per previous weeks when they operated for Citywing.
Eastern have quite a large fleet of J41's, maybe the Metro is to allow them to sort out crew etc as such short notice for Eastern to do. Especially as they've also taken over the old Citywing routes from the IOM to both NCL & BHD
As per previous entry a J41 is due in tomorrow morning from MME so maybe that's the plan, who knows.