Easyjet U23111 / EZY41WP STN-AGP diverted 0845 UTC when south east of Valladolid rerouted Lisbon. Was on the ground for about 30 minutes then resumed flight to AGP.
Maybe EZY had a spare crew / captain available?
Madrid Barajas would have been closer but possibly no spare crew?
Track can be followed on playback on flightradar24 at 0840UTC.