Hello Claire and welcome.
Flight delays are a regular. More regular than most people would like. These can be caused by a lot of things. Late arrival of the incoming aircraft, crew sickness, crew 'out of hours', late arrival of cleaners, fuel trucks etc. They can also be spot repairs. These are nothing to be alarmed at, but wouldn't you prefer that any issue no matter how large or small is dealt with before the next flight?
I checked the incoming flight today and it was slightly later than expected (7:40am vs 7:25 expected) and the same aircraft is due out later than expected today at 2:15.
The upside of this is that this will likely all sort itself out time wise by the time you travel.
One of the ops team may be able to tell us why this specific aircraft was late but I doubt that a 'few hours' delay even constitutes a big problem.
The other thing to consider is that the aircraft you will be travelling on will likely NOT be this same aircraft due to rotations.
Todays aircraft is G-VAST.
Hope this helps, and don't worry yourself
Paul
