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title5.6.2+

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<27700>

The SRID for the projection

+title=British National Grid 

The Title to display

+proj=tmerc +lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=400000 +y_0=-100000 +ellps=airy +datum=OSGB36 +units=m +no_defs
The Projection definition. In order to find the correct definition for your required projection please see http://spatialreference.org/ref/ select the relevant entry and then click on the Proj4 link which will give you what you require.
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Remember that your mapsources Map Sources may be set up for WMS & WFS access. If your mapsourcesMap Sources' associated .map files are set up to support multiple projections then make sure the epsg file referenced contains all the necessary projection definitions. Below is a typical epsg file shortened to only include projections typically used with British data.

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