Now you should believe that the P4 is an excellent way in to Central London. It connects with Victtoria line at Brixton. It rarely takes me longer than 40 minutes to get to the Victoria area. You could also take the 363 to the Elephant and then the Bakerloo lone to the Piccadilly area. There are many possible routes from the FH area - the 185 should only be used for short journeys.