If it's in Ireland, or indeed if you're in Ireland but the bikes here on the mainland beware, as soon as a package has to cross water couriers get giddy with their prices, even though NI is part of the UK, couriers don't give a monkeys.
Parcel2Go are one of the worst for this IME. Their office is round the corner from where I work and I know one of the guys, but they've still been mega expensive in the above circumstances.
Of course, if you're mainland and the bike is mainland then ignore the above