I see with difficulty easyJet flying BRS-SVQ. There is not enough 'leisure' demand to fill the planes. Airbus has created a demand, but no sufficient...
However, there is a strong demand to justificate a direct link between Seville and Northern England. I said EZY in MAN-SVQ because of the route BIO-MAN (similar city as SVQ). I thought EZY had more planes in this base, but as you say, RYR could be more easy to operate. Unfortunatly, RYR would not have more planes until few years, so resuming LPL-SVQ or adding MAN-SVQ will mean the suspension of other route.