Forum member Adamant very kindly put me in touch with some people he had encountered at a game fair who could provide some AT type tyres to fit my Nissan X-Trail as I'd been searching for nearly 2 years for some.
My X-Trail came with 215/60 R17 tyres and it appeared that, certainly here in the UK, there wasn't an all terrain tyre available that would fit. There are, however, quite a few to fit 16 inch rims but I didn't want to spend a fortune on new rims if possible. However Adamant had discovered that the Yokohama Geolandar GO12 ATS in 225/60 R17 would fit and, even more amazingly, that there were a few available here in the UK. They seem to be readily available in Australia where the X-Trail appears to get a lot more off road use than here in the UK and I suspect that the Australians rate it quite highly. It also seems to be the case that more recent X-Trails come with 225 width tyres rather than the 215 that are fitted to mine.
Despite Christmas being just around the corner and my wanting to save the cash after two years of searching I wasn't going to hang about and so quickly placed an order for 4 tyres which arrived on Monday and were fitted by a local tyre place on Tuesday. Today was the first day that I've actually driven any distance on them and from what I can see they are no more noisey than the standard factory fit Dunlops which came on the car. I can also notice little or no difference in the feel of the car on the road and based on what little off road driving I've done on them (about 6 - 7 miles mostly on forestry tracks) they would appear to be quieter and give better feel and a slightly softer ride than the Dunlops did. They don't appear to rub anywhere in the wheel arches and because the difference in size is very small indeed the effect on the speedo reading is about a needle's width at 70mph.
I ordered from a company called County 4X4 who appear to be a part of Stapleton's. Delivery was prompt and although postage to Northern Ireland was a little expensive it came in at around what I expected to post such a large and heavy object.
So, there is hope for all those X-Trail owners out there - reports on performance or unforseen problems will follow should there be anything to report.