Hi Clanman, I can't say what are the best aftermarket shocks in the UK, but I've got KYB rear shocks on my GTL and they are fine. They've been on there a couple of years, done about 10,000 miles with no trouble at all. In that time we've done a few trips to France, sometimes carrying a lot of gear, brought back several bottles of the runny stuff, and they have performed very well.