Hi Conan,
Thanks again and I will do as u advise asap - heading to work in Stockton makes it almost impossible for an empty stretch at 7.30am but will have a go, not scared to try the ABS, and have just remembered that Shane in Sunderland replaced a sensor about 18mths ago for me, so perhaps it's the other one or dirt as u suggest. am sorry but not sure about Vagcom, am not a very good user of your site as I never have time to learn all the terms, I only pester you when I have a problem!!