easyJet rumor
I have also heard this rumor but that it would be for S14
Although they tested the water before from BOH, the routes for the test were certainly not ideal (Grenoble and Krakow) to get a feel for the potential.
The Spanish market (including second home, VFR, leisure and inbound English language students) from BOH is considerable and it is one of the top UK airports for numbers of passengers to and fro. Routes yet to be exploited include Seville, Gibralter, Almeria and Jerez. There may also be market opportunities to Barcelona, Bilbao & possibly a return of Reus.