This is a very common trap by councils amd we see quite a few cases like yours over the years. There are two restrictions, (1) the No Stopping zig-zags with a sign for the applicable times, and (2) the single yellow sign indicating a No Waiting restriction on certain days and times. As there is no sign, you were, in all likelihood, in a CPZ where the yellow line times are on the CPZ entrance signs.
Cases have been won on similar situations where it was claimed the presence of the yellow line restriction is not immediately apparent, and a sign should have been erected for the yellow line as well as the zig-zags. Needless to say the council will never give way, (they want your money !!), so you'd have to take them to London Tribunals and risk the full PCN penalty. There may be cases on this in the LT Statutory Register so you could try searching it using the street name as a reference.
London Tribunals holds separate statutory registers for appeal cases heard by the Environment and Traffic Adjudicators and the Road User Charging Adjudicators. The registers can be accessed through...
