Hi Archie
Unfortunately it is pretty difficult to predict any problems/delays etc. It will depend on so many things including which a/c Virgin Ops decide to use on that specific flight, something which they will probably now know (but never released) but even then it could all change. Everything could run on time with today's flights and then a technical problem could happen tomorrow morning, crew could be ill, weather problems, problems caused by pax etc which could all throw the plans out etc.
Fingers crossed everything runs on time for you and you have a great flight, and if you do have a delay try not to let it ruin the start of your holidays, things do happen from time to time which are totally out of everyone's control and at least if it does go wrong you will be in the CH, which is surely the best way to spend a delay[;)]
Neil