According to this, it sounds as if the routes will all be single daily with a planned increase of RNS and ANR to twice daily later in the year, with one aircraft doing RNS (2), GRQ and FMO and the other ANR (2), CGN and CFR.
Routes News - Six new routes for London's Southend Airport
Not sure what the point of a single daily CGN is, given that all competing LON routes from there are at least wice daily - but we shall see. By the way, SEN-CGN was one of the suggested routes of the stillborn Jump! Airlines.