This is a fascinating case, which shows the complications, and cross jurisdictional problems, that can arise...

http://www.osscsc.gov.uk/aspx/view.aspx?id=2384 - CP 4205 2006

couldn't decide whether to put this here, or in other benefit issues, or in tribunals.... if mods want to move it, feel free

I had a very slightly similar case, except that the NI record was not in dispute at all which helped, and even that was hard enough to disentangle what with foreign earnings nad HRP. It didn't help the the foreign contirbution records were from Greece and therefore in Greek...