9210 GPS and Map Co-ordinates

Hi

I have a 9210 with the GPS module and the Tom Tom maps. This is all very well and good for navigation on streets but I would like to use the GPS module for confirming my map position on British OS maps. Does anyone know of software that can give me the location information from the GPS module in British OS map co-ordinates? Even better if it is possable to download map sections onto the phone.

Thanks

John