nice one Rob, sounds like it's just run in m8
I've got another 8k to go but it's true, the more miles you do the better the performance (up to a point)
Don't know what the optimum is and I guess it depends on the manufacturer - I had a Golf GTi Turbo 150 with 88k on the clock, it had a full VWSH & went like the clappers, so I rekon the Clio's 'optimum is about 60k? Just got to keep putting posh oil in (fully synth) and keep it serviced and it will improve even more!!!
Happy days