Unless there is a late night pharmacy open around you, or a walk-in centre, to be honest, get yourself to A&E. They will be able to help, even if it isn't with your preferred insulin.
If you go the pharmacy route, they will be able to guide you accordingly, and make whatever calls you might need made.
Better safe than sorry, and if 111 call back and decide they want a GP to speak with you, it could take even further time.
DKA could seriously take the edge off your holiday..............
Let us know how you get on.