Absolutely, Here is what I wrote
Subject: PCN Appeal – Blackwall/Silvertown Tunnel Charge
Dear TfL Team,
I recently received a Penalty Charge Notice for using the Blackwall or Silvertown Tunnel (PCN number [insert number]). This came as a complete surprise, as I wasn’t aware the tunnels are now subject to a charge. I didn't notice any signs on the day and would have paid the fee had I realised it was required.
From what I’ve read, this is a new scheme and I understand there may have been a period where warnings were issued instead of fines. Unfortunately, I didn’t receive any such warning and this was my first time using the tunnel since the new charge began.
I’m kindly asking if you’d consider cancelling the PCN on this occasion. I’ve now registered for Auto Pay to make sure I'm covered going forward and to avoid any further issues.
Thanks for taking the time to read this. I’d really appreciate your understanding.
Best regards,
I attached an image of my new autopay account as proof.