From September 3, the standard adult passport fee will be reduced from £77.50 to £72.50 (B3,875 to B3,625).
The reduction, Mr Green explained, has been made possible by a restructuring programme within the Identity and Passport Service, which delivered savings of £40 million (B2 billion) in the past financial year.
IPS Chief Executive Sarah Rapson said: “The UK passport remains one of the most trusted and secure documents of its kind in the world. I am very pleased that we are able to provide it in ever more efficient ways, whilst maintaining our high standard of service and rigorous security checks.
For information on how to apply for a new British passport from Thailand, or a renewal of an existing passport, start here.