On 2014-04-01 19:40:01 +0000, Mizter T said:

My impression is that PCNs from TfL are generally issued on a sound basis

Yes but they can be quite nasty. I've had three tickets recently. One
was parking at 9.55 am in a red route bay that is free after 10 am - I
sat in the car until 10 but was issued a ticket by a camera operator.
Another was parking in a bay that had a council ticket machine right by
it on the kerb - I bought a council ticket and didn't see a TFL sign by
the bay. I appealed that one to no avail. And I followed what I thought
was a congestion charge avoidance route to Tower Bridge - signposted by
TFL I thought - but it cut across the zone briefly.

E.