So time to clean the EGR valve out - no pics as youve all seen it before - it was full of crud and the 2 ports in the intake manifold needed cleaned out as well. 12mm socket on a thin bar ,small flat blade screwdriver and tin of carb cleaner and the job was done. Was the usual struggle to get the egr out and only real downside was i managed to scratch the spoon strut brace

Job was well worth doing as it has cleared the idle issue and made the engine run a fair bit smoother.
Really should be part of the maintenance schedule

Here is a link to marts lude build which shows pics of gunked up egr (half way down the page)

http://www.ludegeneration.co.uk/post15230.html