The Notice to Keeper (NtK) is not fully compliant as there is no evidence that the any contract could have been formed. There is a minimum consideration period required for the driver to seek out, read and understand the terms and conditions and to decide whether to remain or leave.
Four minutes is below the minimum consideration period and therefore there is no evidence that the driver entered into any contract before deciding to leave the location. It is irrelevant whether the vehicle was stopped in a disabled bay or not.
Additionally, the operator is obliged to comply with the the PPSCoP and the evidence shows that the single sign, high up on a post in tiny font does not comply with section 4.1 which states:
"4.1. The parking operator must ensure that at least one sign containing the terms and conditions for parking can be viewed without the driver needing to leave the vehicle, in order for drivers with a disability to be able to make an informed decision on whether to park at the premises."
That single sign does not fulfil that requirement.
However, you are dealing with an IPC operator so no appeal or subsequent IAS appeal will be successful and the only way you are going beat this is to ignore all debt recovery threats and wait for them to send you a Letter of Claim (LoC) and subsequent N1SDT Claim Form, whereto defend it using a template defence we provide and eventually it is discontinued.