I'm totally new to GIS. However, I've proudly managed to create a map, which is correctly geo-referenced with a Great Britain Ordnance Survey (OS) background (streetview level) and I've added some point data.
I would like to know how to create or import a layer with the OS grid lines. I'm sure this has been done a million times, but I can't seem to find the answer on the web - I suspect I'm not using the correct search terms.
Any help appreciated.