Your flight has just literally lifted off from Gatwick, so you at least have a plane on the way to you.
https://www.flightradar24.com/data/aircraft/g-wukg
So this is the aircraft that is in the system scheduled for your flight.
https://www.flightradar24.com/data/aircraft/g-wukj#
As you can see, it definitely won’t be this aircraft.