Getting a device co-ordinates in national grid

Is it possible in C2 to retrieve the co-ordinates of a device in British national grid format, rather than longitude and latitude?

I wanted to experiment with a concept I have, but I need the device co-ordinates in this format to work. I have searched converting long / lat into national grid but these seems very complex.

I just need to retrieve the Easting / Northings (No map etc...)

Thanks,