Start points on OS Maps

If your not sure which OS map you should be using, contact the Walk Leader, who's name and contact details can be found in the walk description/ detals.  

Ordinance Survey maps have a series of faint blue lines which makes a numbered grid that is used to create Grid references. This is a simple way of finding points and places on a map, to give to others as a meeting location or to quote if you get into trouble and need to specify exactly where you are.

The 40-50 Group uses a 2 letter and 6 number grid reference to denote the start/ meeting points for its walks e.g. "SY123456". 

Letters: The first letter (for example ‘S’), denotes 500 km by 500 km squares and this is subdivided into 25 squares that are 100 km by 100 km within it, making ‘ST’, ‘SU’, ‘SO’ and so on.

Numbers; The first three numbers relate to the numbers along the top and bottom the last three relate to the numbers on the sides of the map.

Walk leaders often include OS map number references, these number which OS yuo should be using; the grid reference applies to that map.  

The walk leader often includes a nearby post-code (assuming there is a building nearby), which you can load in to your Satnav; make sure you have the walk leaders number with you, in case you should need help.      

Tip; go in to Google and type in the Grid Reference (get it right, errors may send you miles away), which, should bring up a map with a pin pointer showing the meeting point.

When should I arrive?

Each walk will have a start time; ideally you should arrive 15 - 20 minutes beforehand, giving you time to get organized, put your boots and water-proofs on and introduce yourself to the walk leader.