have you tried www.multimap.com
http://www.multimap.com/map/browse.cgi?X=235000&Y=481000&width=700&height=400&client=public&gride=&gridn=&srec=0&coordsys=gb&addr1=&addr2=&addr3=&pc=&advanced=&scale=25000&up.x=21&up.y=12

copy and paste that lot, and it will take you to baldwin, and navigate from that