Ok, I understand.
But as I believe, the prosecution have to prove my guilt beyond reasonable doubt? So in my mind, having this contemporaneous text message, will make it very difficult for the prosecution to prove I am not telling the truth.
This is not a mistake on my part, I am not claiming I sent it late or forgot to send it etc. I genuinely sent the letter back with the relevant details on it.
As I am not used to how these things work, I naively thought that if they didn’t receive my reply by the 28 days given, they would have notified me of not receiving a response. In that case, I would have still had time to gather the cctv of me posting the letter to prove my innocence.