Martin² writes
I suspect their system doesn't work anything like the claimed 85% reg. No.
recognition, hence not enough fines.
Of course they are keeping the actual numbers secret, as long as most people
fear the fine, they will pay up,
until someone blows the whistle...

Keeping which numbers secret? The number of PCNs issued?

http://www.tfl.gov.uk/pdfdocs/cc/cc-...nth-report.pdf

Yeah, stick the figures on a public website - that'll keep them secret.

--
Dave