Mr Sherry added: "We are puzzled as to why so many in the trade object to the proposals when a minority of licensees are already serving a full liquid pint
However, it was immediately criticised by the Campaign for Real Ale, which believes drinkers deserve a 100pc liquid pint.
"This is despite the fact that realistic proposals already exist for a 100pc average liquid pint law."
The Parliamentary motion, which has so far been signed by four other MPs from across the country, says: 'When ordering a pint measure, beer and cider drinkers should receive a full liquid pint
without having to ask for a top up.'
Three per cent of the pints were more than 10percent below a full liquid pint
and froth was depriving the West Midlands drinker an average of 5.6p- worth of beer per pint.
"I want to ensure that a liquid pint is what consumers get in full," Leigh said.
Most pubs in the north of England, where a bigger head is traditional, already use larger glasses that are marked to show where the liquid pint should end and the head should begin.
A covert operation by trading standards officers discovered that only three out of 23 premises served customers with a full liquid pint. Some pubs may be prosecuted.
When a brim measure glass is used to serve a pint of beer with a head, the results show a full liquid pint is rarely given.