Free Traffic Legal Advice

I have a video link of the alleged offence if allowed.

You are allowed - see
https://www.ftla.uk/civil-penalty-charge-notices-(councils-tfl-and-so-on)/read-this-first-before-posting-your-case!-this-section-is-for-council-tfl-dartme/

Also post up the PCN number and Reg.mark with a GSV link to the location.

Dropping my child off to school as we were late.

So what happens when you are not late ?

I'm afraid being late for school is not a valid reason for stopping on the zig-zags.  There may be a technical appeal based on the council management of the enforcement process, so wait a bit but don't miss and PCN deadlines.