Guy Martin embarks on his latest speed challenge - to win himself a Guinness World speed Record - by attempting to become the first person to ever drive a tractor at over 100mph ...

In Staffordshire, cameras follow the engineers behind the world's fastest tractor - the JCB Fastrac 2, which has clocked 150mph - and see it in action. Off the coast of Devon, there's a look at the 53 ...