You should return your collective passport to the passport office that issued it immediately and explain the situation. Providing the alternative date of travel is within the same travel season, we can amend this for you free of charge.
However, if a number of changes to the collective passport are also required - for example, adding or deleting numerous party members - a new passport will have to be issued and the standard fee for a collective passport i.e. £39, will be charged.
24-hour Passport Adviceline: 0300 222 0000 (see terms and conditions). Calls made to 0300 numbers from landlines and mobile phones are charged to customers at their network provider's national rate. Live operators are available to assist with your enquiry 24 hours a day.