Re: BNG Coordinates for custom maps

If you just want to convert a (WGS84) latitude/longitude to an Ordnance
Survey grid reference (OSGB), and vice-versa you might want to check
out my JScoord and PHPcoord packages:

http://www.jstott.me.uk/jscoord/
http://www.jstott.me.uk/phpcoord/

Jonathan