I've justed added a couple of pages to my website on two Pye Telecom PMR products I had involvement with in my early days in the development labs there.
See Pye Telecom PF1 Handhelds and Pye Telecom PF8 Handheld
For far more information on Pye Telecom see the website http://www.pyetelecomhistory.org/
Incidentally there is a drive to set up a permanent museum of radio history in the Cambridge area in which Pye Telecom products would be featured. £30k is needed to get this project off the ground. See the Pye Telecom History pages for more information on this project.