Free Traffic Legal Advice

I was sent a PCN for my vehicle not paying the Heathrow T5 drop off zone in mid November 2025. I copied the text of how to reply from this forum, as expected I got the letter asking for the drivers details, which I did not reply to. I then recieved a reminder letter in mid March which I did not reply to. I have now recieved a letter from Debt Recovery Plus saying unless I pay up they will commence legal action. I hadnt read of anyone else getting this letter on the forum, does anyone know how I should proceed.

Note: The reminder letter in mid March says "As we have not recieved a payment or an appeal this PCN is still outstanding" I did appeal using the standard wording from this site.

Thanks in advance.

I recieved a Use of Drop Off without valid payment Heathrow T5 Drop Off, I followed the advice on here and sent them the standard text. I recieved a couple of chases from APCOA asking for drivers details, which I did not reply to. I have now recieved a letter from Debt Recovery Plus saying they will start legal procedings if I don't pay up. This seems to differ from previous cases on this forum. Am I still OK to hold my ground?