[OpenGuides-London] Long map reference messes up formatting.

I have spotted a rather long URL at http://london.openguides.org/index.cgi?Benugo

http://www.streetmap.co.uk/newmap.srf?x=531777&y=182152&z=0&sv=E... &st=2&tl=Postcode+EC1V+4JS&pc=EC1V+4JS& mapp=newmap.srf&searchp=newsearch.srf

This rather messes the format of the page - at least under Firefox the "frame" (is there a proper name for this) stretches to fit the long URL.

This leads me to wonder - is or should there be a standard way of representing MAP references. I would prefer the grid ref to the postcode and certainly not both. - could the underlying software provide a built in map ref construct. [531777,182152]. - could the software truncate a long URL when displaying on teh screen.