I did the causeway coast half marathon on the 23rd sept, I saw plenty of people from england, scotland etc.
The scenery was outstanding and well worth travelling over for if any of you are interested for next year, they have all distances catered for and it is very well organised, bus transfers etc.
It is a trail running race on mostly singletrack, so my time was well off what I could manage on road, as an experience though it was top notch.