Following graduation from Cambridge in 1987,  Andy  worked for around 20 years at the Philips Research Labs (south of Redhill) and from 1995 led a series of research projects on the design of GPS receivers.

My work led to around 50 patents and the creation of a separate spin-out business in 2008, which was subsequently bought by u-blox, a Swiss firm that specialised in GPS.

I have therefore spent over 20 years designing GPS receivers and will happily talk about them to anyone who will listen!