I bought some of these http://www.horseid.co.uk/products/smallslide-on. They are awesome. Classiest ID tag I've seen in a long while! If you follow their link to their fb page on their website they have discount codes and competitions too.
Thanks everyone, doesnt look like there is much out there then. I think I'm going to go with the HorseID slide on things - I'm lazy and just know if the small coil gives up the ghost i'll just never get round to replacing it and it will cost me more in the long run. Besides they friggin' jangle...
Just recently on fb there have been lots of stories of lost horses when riders have fallen off so its got me thinking. What on earth would I do in that situation? I also realised I have not got any ID locating info on my horse or myself. I have seen a classified on HHOclassifieds...