AirMadrid is the only scheduled one confirmed so far. A330s, it would seem according to Gatwick website:), but as it says above, smaller equipment is more probable.
Yep Amadeus is showing NM3812 as being an A319 and NM3814 as being a 737-400. Sounds more probable than an A330, though definately less interesting 😮
Having said that Air Madrid don’t operate 737-400s as far as I know :confused: