

All you need is the free download for your fone and a blutooth gps receiver (which cost me 25quid on fleabay) -
RaceChrono is a GPS based lap timing software for S60 and Windows Mobile smart phones
http://www.racechrono.com/
They already have most of the UK tracks to download but making your own is pretty simple aswell! Worth a llok if you fancy a laptimer!