Volvo update FIXED!!!
Many thanks to Arfur Dealy. Contacted the people (via the link you sent me) by telephone. A really helpful guy answered, asked for registration number of Volvo, so he could work out which engine it had, told him the various codes it was throwing up. Sounds like it needs a new Actuator Position Sensor he says, this is the ebay number, we keep them on the shelf £40 inc VAT and delivery. Arrived this morning, fitted, 20 mile road test, drives like new. HAPPY DAYS.
That's what is so brilliant about this forum, helping each other out with advice and our years of combined experience!!! I owe you a pint or 3 Mr Dealy !!!