Thanks. I accept your point on saying show you have taken action through buying an annual pass already, but I'm worried if I put that, they may ask for proof which I don't have. So I've left it out of the revised draft below, but let me know if i'm being stupid.
Revised draft: (Changes in bold)
Dear Sir/Madam,
I offer my most sincere apologise for my shameful actions in this case. In all other circumstances of my life, I had until this point - upheld a strong degree of integrity and character. As a young lady starting out my career, a criminal record would completely devastate my current and future employment prospects.
I’m in my first job working in London and had been using carnets to travel to and from work. During the week of the 8th January, I was in the midst of moving house and with everything going on even more stressed than normal. On the 10th January, I caught an extra early train at 6:21am from Letchworth Garden City to attend an earlier-than-usual meeting.
Due to it being much earlier than I would typically travel, I hadn’t prepared a carnet beforehand like normal, but instead planned to complete a blank one on the train.
In complete stupidity, I didn’t check there was a blank one in my bag and whilst on-board, I realised to my horror I had forgot to pack the empty carnet.
In panic, I searched through my bag and could only find a previously used carnet. In a complete error of judgement, I stupidly changed the dates on the carnet to the 10th January. This was a terrible thing to do and I am extremely ashamed of my action.
Upon arriving at Kings Cross, I was questioned by the ticket officer and at which point, I admitted whole heartedly to what I had done, apologised profusely and explained the circumstances. The officer thanked me for my honestly telling me he would leave a mark on my file, but advised he would have to report the incident.
I made a grave mistake. I have never done anything like this before and certainly will not do anything of this nature again. I am extremely sorry for the way I acted and the damages this action has caused others.
I am more than willing and able to make immediate payment to cover the unpaid fare, administration costs and any other costs you require. I’m genuinely really sorry and do not want my stupid mistake to go any further.
I appreciate your consideration in this matter.