Had my cambelt and waterpump replaced a few weeks back, it hasn't been used much in the past few weeks, but I've done a few hundred miles in it over the weekend and I've noticed this clicking/ticking noise when driving. When stationary the noise isn't there, but when driving it returns. If i put both front windows down, radio off, its definately a noticeable noise. She drives spot on as usual, you wouldn't know anything was a miss from inside the car with the windows up. Its the sort of noise like something is tapping/rubbing/clipping something else as it passes by if you can imagine that...? I planned to do an oil change this weekend, but its so damn miserably and cold, current oil has done 6k.

any ideas?