GSV latest shows the signs covered over with grey paper, so we can't see what the restriction times are, but whatever, this shows the hazard of using satnavs in minor residential streets in London.
https://maps.app.goo.gl/CUCsriKYjVX3zK788Satnavs are
never fully up-to-date and, indeed, seem to induce automatism in drivers who obey the instructions, but don't look out for restriction signs. So your PCN is what I call a "satnav-assisted PCN". How councils must love people using satnavs !!
In cases like yours I always ask the OP to tell us how they approached the restriction. Head-on to the signs is hard to appeal against, but turning into a restriction really needs some advance warning, but GSV shows none. Are you able to return to the site to take photos ?
In addition to the signage adequacy issue, (the legal requirement), there may be a technical appeal based on council mismanagment of the enforcement process. Such appeals have nothing to do with the contravention, but turn around council statutory duties in the enforcement process.I'm not an expert on these but our Hippocrates is, so wait a bit until he posts.