Video:
https://www.youtube.com/watch?v=8GpmgIeFvLw
GSV: https://maps.app.goo.gl/egDwFgHuxw59ep4r7
The traffic order is The Croydon (Traffic Movement) (Consolidation) Order 2019 (https://drive.google.com/file/d/17K4uLePY1t8K8meWfw6bEVWjcBbNclBQ/view) and the map tile is U11 (https://store.traffweb.app/croydon/documents/parkmap/msched/U11_rv2_2.pdf), I can't see any issue with either.
What is your connection to the Ltd company that is the registered keeper?
The most obvious ground for making representations is that the penalty doesn't state what type of vehicle is prohibited, as per these cases:
Roger Marlow v Royal Borough of Kingston Upon Thames (2170021610, 23 February 2017) (https://drive.google.com/file/d/1lEGiMYisrwPJkHb8oz-Qdq2CByNSeeSu/view)
Stanmore Quality Surfacing Ltd v London Borough of Brent (223050929A, 13 January 2024) (https://drive.google.com/file/d/1L3OEwynmO8a3iWg8Qs5pPSE8BlA_3Nl-/view)
Stanmore Quality Surfacing Ltd v London Borough of Havering (223050945A, 13 January 2024) (https://drive.google.com/file/d/1MEAhzT8Df7MWJhCskE7Fnl5KnqII0DQz/view)
Stanmore Quality Surfacing Ltd v London Borough of Havering (2240046992, 23 March 2024) (https://drive.google.com/file/d/1vYAHQpakhduws7lEvJVV6EcoshW6xoXb/view)
Here is a draft:
Dear London Borough of Croydon,
We challenge liability for PCN CR19769222 on the basis of a collateral challenge, specifically the penalty charge notice does not comply with the requirement of section 4(8)(a)(i) of the London Local Authorities and Transport for London Act 2003, because the type of vehicle that is prohibited is not specified. There is no way to tell from the PCN where the prohibition is related to the vehicle's weight, height, width, or indeed whether it is a prohibition of all vehicles.
As the penalty charge notice is not compliant, there has been a substantive departure from the requirements of the statutory scheme, and it follows that the only penalty that may be demanded is nil.
Yours faithfully,
Of course only the registered keeper can make representations, though you can make representations on the company's behalf if you are a director or the company authorises you to do so.
Representations should be made online and you should keep a screenshot of the confirmation page. The council will undoubtedly reject but it should be a straightforward appeal to the tribunal.