DV You will find the answer here:
http://www.publications.parliament.u...t/91209w01.htm
9 Dec 1999 : Column: 591W
Type of aircraft Nimrod .
Main locations Kinloss
Date first entered service 1969
Life expectancy (approximate figures in years) 40
Kapton wiring. Kapton is a trademarked material. It is one of a range of polyimide coverings used to insulate aircraft wires. Some 740 British military aircraft contain wiring of this type.
I hope this is helpful
And if you want to read a longer discussion go to :
http://commdocs.house.gov/committees...pw106-37_1.HTM
SORRY I was wrong and DV was right I have a job with all these technical terms