compton3bravo
Not that is worth flying to with Seville being so close BA did previously fly to Jerez de la Frontier during the GB Airways franchise along with nearby Seville.
Although not as popular as other areas in southern Spain the Costa De Luz is becoming more popular with the British with many flying into nearby Faro and crossing the border over into Spain so Jerez could cater for this market.
But I don't see Jerez being added to the BA network maybe as Avgeek mentioned Almeria, Las Palmas, Palma are obviously all candidates as are Berlin and Milan and maybe Ajjacio or Bastia in Corsica.