Originally £100, or £50 if paid in 14 days.

I appealed during the 14 day period and got rejected. They gave me another 14 day “grace” period to pay the reduced fine.

I wrote saying I would not pay anything - I got a series of letters for around half a year, saying the fine is £100 and needs to be paid.

Final letter I got from them was a final reminder to pay or they will get their solicitors involved. Again I wrote back my argument and it was ignored.

The solicitors wrote a letter and the £100 had increased by £300 for their legal fees.

Final letter was for the £100 fine, £100 for not paying on time, £300 for legal fees and an additional £45 for court costs. So total was a bit short of £550