The International Cricket Board and the Pakistan Cricket Board are in discussions over the no-ball revelations that have stunned the world.
Top executives are understood to be considering short-term measures against the accused Pakistan players, including suspending trio Mohammad Aamer, Mohammad Asif, Kamran Akmal and captain Salman Butt from the rest of their tour of England.
On the move: Mohammad Asif and Mohammad Aamer (below) get on the team bus as Pakistan leave their London hotel for the trip to Taunton
The players have been questioned by Scotland Yard over claims that they took cash from an international betting racket.
The fixer who allegedly paid the Pakistan players to under-perform, Mazhar Majeed, was arrested by Metropolitan Police and later bailed.
News of the World reporters claimed to have paid the middleman £150,000 in return for exact details relating to play during the final Test of the four-match series with England at Lord's.
They met Majeed and the Pakistani players by posing as front men for a Far Eastern betting syndicate.
Footage filmed secretly by the newspaper appeared to show Majeed accepting a huge pile of banknotes and promising to reveal exact details of when Pakistani bowlers would deliberately deliver three ‘no balls’ – stepping over the line, supposedly accidentally.
Majeed, who was born in Croydon, was photographed showing off the cash inside his jacket to the players outside a restaurant.
In the spotlight: Mohammad Aamer was named as Pakistan's man of the series
Then at Lord’s last Thursday and Friday, bowlers Mohammad Aamer and Mohammad Asif delivered the promised no-balls at the specified stages.
Pakistan left their hotel in Swiss Cottage, London, at 1pm to make the journey to Taunton for the remainder of their one-day and Twenty20 matches.
Pakistan are due to face England in two Twenty20 matches and then five NatWest Series matches over the next three weeks.
Nightmare: Pakistan's team manager Yawar Saeed leaves the hotel on Monday morning
The worry is that those limited-overs fixtures against England are in jeopardy amid suggestions the home team may not be happy to play against the Pakistan players who have come under suspicion.
Pakistan has dispatched a three-man delegation representing the Federal Investigation Agency - the country's highest law enforcement agency - to London to probe allegations of 'spot-fixing'.
Pakistan's interior minister Rehman Malik insisted his country would not back down from conducting an independent investigation into the charges.
'Scotland Yard is doing its own investigations, our team is there to assist them and also independently find out what has happened,' Malik said.
'The FIA delegation will not only assist but also carry out their own inquiries into the allegations made against our players.'
England captain Andrew Strauss has already called for life bans for anyone found guilty of match-fixing.
'If someone is proven to categorically be guilty then the only way forward is for them not to play international cricket again,' said the England captain, who led his side to a series victory on Sunday.
'We are both sad and despondent because not for one moment did we think anything untoward was happening in this Test. It is important to remember they are only allegations at this stage but when I was sitting watching News at Ten on Saturday I didn't expect our match to be lead item.'
Pakistan's Sports Minister Ijaz Jakhrani said any players found guilty would be banned for life.
He said: 'We will take strict action, but first we will have to look at the inquiry report (from the British police) and once it implicates someone then we will give exemplary punishment. All the players involved must forget to play for Pakistan in the future.'
