To bring all readers up to date.
I started the paperwork for an Appeal but then went to look at recent decisions for this location.
I found that adjduicators Harman, Hoare and Houghton had all refused Appeals.
I am in front of two of those adjudicators regularly and would have had to show them why the signage, which they previously found to be adequate, was inadequate.
I felt the chances were less than 50/50 so after some debate with the OP the 50% has been paid.