The ECB made arrangements to cover enormous potential loss of earnings in the event of Pakistan pulling out of the series in the wake of ball-tampering row.
The West Indies were confirmed as Pakistan's replacement team and a hastily formed International XI was also arranged in case Pakistan failed to play the Twenty20 match at Bristol on Monday.
''Our contingency plan has now been stood down following the unequivocal commitment from the PCB to fulfil the remainder of the tour,'' ECB chief executive David Collier said in a statement.
''We now look forward to an exciting Twenty20 at Bristol on Monday and the five-match NatWest Series one-day Internationals.
''In particular I wish to express our gratitude to the West Indies Cricket Board, Nottinghamshire County Cricket Club and Glamorgan County Cricket Club in addition to our sponsors and broadcasters for their fulsome support of ECB's contingency plan.'' ''ECB also wishes to thank the 12 players who had agreed to play in the International XI and the management team who had been invited to support the International XI,'' the statement added.