Glasgow City Council has been accused of stalling a parking appeal which could find that a driver has been unlawfully penalised because warning signs near Hampden Park are almost five metres high.

The Scottish Parking Appeals Service is considering a case brought by one motorist who was given a £30 fixed penalty for parking in Kingshill Drive during a Diamond League athletics event on July 12 2014.

Both the driver and her husband, who have asked not to be named, said they could not see signs from their car which warn that dozens of streets around the stadium are part of a ‘Restricted Permit Zone’.

Official paperwork suggests the signs should be 4.2 metres from the ground but some are almost five metres high.

At an earlier hearing the driver’s husband told Adjudicator Ian Kennedy that they are “unlawful”.

If the appeal is upheld, it could mean that thousands of drivers have been unfairly fined by the local authority.

Figures produced at the hearing show 6,199 fines were issued in the two years from January 1 2013.

Many of the fixed penalty notices will have already been paid by sports fans who attended Commonwealth Games events and cup finals.

The case was adjourned for 28 days after the first hearing on June 29 and now Glasgow City Council has secured a second adjournment.

A letter from the Parking Appeals Service seen by the Evening Times states: “As you know the adjudicator adjourned the case for a period of 28 days and requested that the points raised in the adjournment notice be addressed by July 31.

“Glasgow City Council has however asked the Adjudicator to further adjourn the case to allow the council to seek legal advice.

“The adjudicator has agreed to an extension time for a further 28 days until August 28 to allow the council to seek and obtain legal advice.”

The motorist who has fought a year long legal battle against the parking fine said: “Whilst this suggests Glasgow City Council is now on the back foot, it does mean that I may be up against a posse of solicitors and that the process is now likely to drag on.”

He has previously insisted that he and his wife “genuinely didn’t see the signs” and “wouldn’t have parked there if they had”.

Speaking at the initial hearing on June 23, he said: “To set out to install signs on 4.2 metre poles and then to actually install signs at 4.7 and 4.8 metres shows negligence on the part of Glasgow City Council.

“I strongly believe that this will have been brought to the council’s attention before now because there have been more than 6000 penalty charge notices issued in that area.

“I believe that there is a public interest to be served so that councils are dissuaded from behaving disingenuously and effectively extorting money from motorists in future.”

Adjudicator Ian Kennedy said: “If it’s a problem for you, it may be a problem for others.”

A spokeswoman for Glasgow City Council said: “Everyone has the right to appeal and as this is currently with the independent adjudicator, it would be inappropriate for us to comment while this process is ongoing.”