THE or Speedstuff make some good fender style mudguards. Speedstuff is cheaper too. They both now use a rubber bung to hold it in place rather than the star fangled nut of old which tended to mishape the bracket holding the two plastic guards.
I use this type of mudguard even though some say it's gay or whatever but I'm the one first down the muddy descent 'cos I haven't got any crap in my eyes.
Oops! Sorry i checked on the Speedstuff website and they haven't got a UK distributer.
Like I said the THE fender is just as good and a little more stylish but the price is a bit higher though chainreaction are doing them for 20 quid if you take a look here