Were you using satnav ? We see more and more cases of OPs on here that pass these signs as if they are obeying satnav instructions like automatons. Sorry to say it, but that is the impression I get, so please don't be offended!
The plain fact is that there are restricted and closed streets like this all over London now, and one must be alert to the signs. Of course they are almost all on side and minor streets and roads. DId you approach the signs head-on or did you turn left into them ? Turns into these restrictions are much easier to appeal than when one approaches direct.
As well as passing the actual restriction signs, it you approached head-on, you also passed these two signs: -
https://maps.app.goo.gl/Tp2Ggj1JRcn7FPxg8The presence of these will make it much more difficult to build a robust appeal to take to London Tribunals. However, our 'Hippocrates' has developed appeal arguments based on council mismanangement of the enforcement process, so wait a bit to see what he has to say. Such appeals have nothing to do with the alleged contravention itself/
