Free Traffic Legal Advice

Frankly, I cannot see any possibility of a win on what has been alleged, namely parking off-carriageway. This has been an offence in London since the mid-70s and requires no signs or lines. In your case, the CEO had a choice on what to put on the PCN, (parking on DYLs, or parking off-carriageway). However, there are two exemptions to the yellow lines, but none for parking off-carriageway, hence his choice.

Others may differ, so wait a bit to see if anybody else says anything,  but don't miss the discount deadline.

Thanks

And, am I correct in saying observation time is not a factor anymore?

Observation time is not legally mandated, but most CEOs usually wait for a bit for alleged contraventions where there is an exemption that may not be apparent on first noticing the vehicle. There are two exemptions to yellow lines, single or double.  However, there are no exemptions for the off-carriageway contravention.