But the Irish authority surely like the CAA would demand a minimum runway run either way - remembering that weather conditions could impact on take off and landing run - there will still need to be some kind of approval I'd suggest.
How much shorter is Dublin than Birmingham or Glasgow? Both of which have the B777-300ER to Dubai on a daily basis. Thus far there's only been one spot of falling off the runway and that was taxi-ing round a tight corner at Link B at Glasgow....
Incidentally, the B777 has pretty good brakes.....