Free Traffic Legal Advice

Received a PCN today from Hammersmith and Fulham. Wondering if it is worth challenging and if there is any advice on the grounds I should use to challenge?

I feel that from the photos and my memory of the road conditions - i.e. that it is an incredible busy auction with multiple signage, that unusually the bus lane tappers in from the right(?) and that it is such a short bus lane - Further that the signage at least in the photos is at the point of the bus lane starting and potentially obscured by high sided traffic? Interested in a guidance - looking on here and generally Sonline understand this particular contravention has been described as 'notorious' and somewhere else that this particular offence at this location accounts for a very high number of PCNs in Fulham? Sure that in itself is showing that the signage is inadequate?