Ordnance Survey map to be used in QLandkarte GT.

Ordnance-Survey.tms

<TMS> 
    <Title>Ordnance Survey</Title> 
    <Layer idx="0"> 
        <Script><![CDATA[ 
        ( 
        function convert(z1, x1, y1) 
        { 
            serverpart = 0 
            serverpart = (serverpart + 1) % 4; 
            function encodeQuadTree(zoom, tilex, tiley) 
            { 
                var tileNum = [] 
                for (var i = zoom - 1; i >= 0; i--) 
                { 
                    var num = (tilex % 2) | ((tiley % 2) << 1); 
                    tileNum[i] = new String(num); 
                    tilex >>= 1; 
                    tiley >>= 1; 
                } 
                return tileNum.join(""); 
            } 
            return "http://ak.t" + serverpart + ".tiles.virtualearth.net/tiles/r" + encodeQuadTree(z1,x1,y1) + ".png?g=3291&productSet=mmOS";
        } 
        ) 
        ]]></Script> 
    </Layer> 
    <Copyright>Ordnance Survey</Copyright> 
</TMS> 

To use this tms file:

1. Install QLandkarte GT. You can get it from http://sourceforge.net/projects/qlandkartegt/
2. Open QLandkarte GT.
3. Go to File > Load Map
4. Download this tms file and select it.