Free Traffic Legal Advice

Today, when I went to the post office for 3 minutes, I saw a parking ticket when I got back to my car. I drove away and returned literally 1 minute later to take photos for the appeal.
I didn’t notice a single yellow line; there was a car parked on the opposite side of the street, so to leave room for it to pass, I drove onto the sidewalk. That resulted in a ticket.
Should I appeal? Honestly, I’m furious—I should have just parked on the street and not worried about blocking traffic. I also have this feeling that the person who gave me the ticket was sitting in that parked car.

Link to the photos(ticket, ticket photo evidence 12:54-12:56, street photo 13:01) :

One PCN

Link:
https://imgpile.com/p/jn1Qu9F

I should have just parked on the street and not worried about blocking traffic.

I suspect you wrote this in haste and with your frustration still in control.

Remember(drivers often forget) all the CEO saw was your car clearly parked on the footway and, judging by the photos, obstructing free passage along the footway. Hence the PCN. They knew nothing about your reasons for parking there.

Do any of these exemptions apply: see 15(3)  https://www.legislation.gov.uk/ukla/1974/24/section/15