Thanks for taking the time to post the fix Pip.... may come in handy for future owners/members.
Dual Mass flywheel's are being fitted to most diesels nowadays to stop the vibrations being transferred. I remember the older diesels having shaking pedals and gearsticks.
Symptoms can be a failed starter motor and excessive vibrations/noise/juddering.
Premature wear could be a sign of excessive urban driving... the diesel being better suited to long distance driving with the six speed gearbox, turbo and DPF system.
Good news is they should, hopefully, have fitted a new clutch fitted at the same time.
Cambelt and waterpump change is very good advice from TinyTim if not already done. From experience, it must be done by a competent mechanic/garage as the engine mount needs to be removed to gain access and the belt then tensioned correctly... too tight can cause waterpump failure and can snap the belt thus destroying the engine.
I recommend Darren at AlfaTech, Ledbury, Herefordshire to all after saving our engine from this.
http://www.alfa-tech.co.uk/