Mr Mustard sees quite a lot of facts in the typical week (and an awful lot of theory) and now and then he has decided to share them with you.
In order to enforce parking contraventions the council needs software to keep all of the paperwork in order and to process parking tickets through the system. You might be surprised to find out how expensive it is to issue & process parking tickets. The annual software fee for 2012/13 is £268,603 (+ vat) and each year the council issue about 160,000 parking tickets so that is £1.68 a ticket just to keep a record of it. It doesn't sound much per ticket but the quarter of a million pounds has to be paid regardless of the number of tickets issued.
Prior to computers it just wouldn't have been possible to issue this many parking tickets without hundreds of clerks following the cases.
In addition 50p out of every parking ticket issued (whether paid or not) gets paid to London Councils to fund PATAS. So that is £2.18 of your parking ticket money spent as soon as the ticket is printed out.