I wonder if you might be interested in how I find my way to where I want to go without using a map. I've been using the probability theory for over 20 years. It's probably why my ten year old daugher gave me a book of road maps for Christmas and why she often says 'are we lost mummy?' to which I reply 'No dear, we're just not there yet.'

My probability theory involves following someone who is probably going my way. Today, coming from Liverpool to Manchester, I followed a single man in a suit in what might have been a company car and who was probably going to Manchester. He was.

In twenty odd years I have only once followed a driver up their own drive to their garage.

I thought I was alone in using the probability theory, till my friend Tricia told me how she found her way to the new John Lewis store which had opened near Manchester. She simply followed a woman in a car who looked like she was probably going shopping there. In the event, she was going shopping, but at the Trafford Centre near Manchester where Tricia spent a happy day instead.