The Times discussed a similar case on Saturday: https://www.thetimes.co.uk/article/default-water-rates-system-is-a-scandal-wnqm0gg8j?shareToken=7bb36c5bbae39dac1ff0fc14681f0183. Read second letter re parking fine from 2003.
Seems as if government chasing old debts, note they are criminal debts...