Sick note includes fake doctor's signature

But the Birmingham Chamber of Commerce has failed to see the funny side.

Policy director Louise Beard insisted Umbro was behaving irresponsibly.

She added: "Any employee who gets found out will be sacked.

"It is a fraudulent act against the employer and the state."

The sick note appears on a section of the Umbro site called 'Bunk off'.

Harmless

Other features include a holiday form geared around World Cup matches and a list of excuses you can give for having the day off.

Umbro marketing manager Eddie May told BBC Radio Five Live it was only meant as a bit of harmless fun.

"It's a bit of tongue-in-cheek to make people aware that the kick-off times are going to be difficult," he stressed.

"We don't expect anyone to seriously use this form, although it is quite realistic.

"We're looking at ways to amend it so it is more obviously a joke because we don't want anyone to get into trouble.

The original Sicknote

"We're not encouraging people to seriously skip work without permission."

Nevertheless, there will almost certainly be an outbreak of 'skiveritis' across the country come June.

Fortunately for employers, there is one consolation.

The way England's build-up has gone so far, it's unlikely they will be troubling the TV cameras beyond 12 June.