Show region maps

[Stephen Brownsteele]

Hi, does anyone know what the region code for London is? I've just finished mapping out some data for GB and now I need to get specific and just map London data.

var options = {

        region: 'GB',

        displayMode: 'markers',

i thought it would be 'GB-LND' but that results in "this map does not exist"

Any help would be appreciated.