Free Traffic Legal Advice

I received a PCN for the alleged traffic contravention of 52JM Failing to comply with Prohibition on certain types of vehicles(motor vehicles) on Federal Road (Perivale Ealing). I am not from the area. The signs were not very clear on the day in question, also the driving conditions were very poor. I was raining heavy and the signage was very confusing. Also the tree branches were covering the the signage. The images the council has sent/uploaded are not very clear either. It looks like from this forum that many people have fall foul while driving on this road What are my chances of success?