Would be quicker through the middle of bricketwood IMO.Black Boy Pub is just on the other side of M25, Walk back across M25 THen Lye Lane is on your right, 10 maybe 15 mins walk
http://www.multimap.com/map/aproute.cgi?client=public&lang=&rn=GB&input_rt=aproute_pan&startcountry=GB&startrd=&starttown=&startpc=al2+3tf&endcountry=GB&endrd=&endtown=&endpc=al2+3ru&qs=q&starttime=17:47
but as I have posted before Lye Lane is a twisty single lane so drive slow and mind the above bus boy