I don't use Island 4x4 unless its a large item that justifies the 'minimum' £15 charge they make to send anything to the Isle of Man. I asked them to post something by Royal Mail (would have had the little item next day as I needed it urgently) but they sent it by courier and the massive box arrived well over a week later, I had given up on getting it so called Rimmers and a jiffy arrived next day, use Rimmers more now, they can be a bit expensive but they do a good service.
4x4 seem to always use couriers!!! ridiculous.