Thanks Saint. I was looking on
for a second hand replacement - £80 and £117 - when I saw people selling the fix advice for 85p and £1, so I thought I'd try the forum and came across your advice. Renault dealer told me it was just a replacement bulb needed, just before my (private) warranty ran out, so I let it go then! Soldering iron out tomorrow, but it is a pain that Renault have such a common fault.