Thanks for that mate, I shall push for £5K as my price then.
I spent all day Monday lavishing time and elbow grease on it and it was definitely worthwhile. The old girl looks absolutely fantastic, the paint so deep and shiny that it looks like black water. Spent Tuesday on the interior cleaning the leather and will hopefully get it MoT'd today. Plan is to PX it for another car by Friday so I don't have to put another six months tax on it. Chances of achieving that are somewhere between nil and zero but it's worth a try.