This is the postcode of either the parking for the race, or the race HQ or the start of the race.
The idea is that this is somewhere to aim for if you have a satnav in your car.
If the venue is away from houses, the postcode may be inaccurate and point to a place nearby.
Please let me know (by clicking the contact link given below) if I get the wrong postcode.
There are also links to streetmap.co.uk and maps.google.co.uk maps giving the approximate postion of this postcode.