• It allows someone to travel whilst applying for visas at embassies at the same time.
• It allows people to travel to conflicting contries, most specifically someone with an Israeli entry stamp cannot enter places like Saudi Arabia, and other Muslim nations.
• For applicants where their might require two passports, eg pilots, flight attendants, people that work on oil rigs, etc.
• Applicants that do not live in the UK, and in case they need a back-up passport. Eg live in Dubai but its convenient to have a concurrent passport in the UK.
• For those who travel very frequently and their existing passport gets completed very quickly stamped and finished early, e.g: A British passport holder that is based in Singapore and travels around Asia, or Dubai and travels around the Middle East and Africa.

A second UK passport could be issued from the Passport Office for frequent international business travellers that intend to visit visa entry destinations. This would allow the traveller to utilize one passport for, sometimes lengthy, visa submissions while continuing his travels on the other one. Another use of a second British passport is for visits to conflicting destinations where a visa application would be rejected due to pre-existing stamps from another conflicting country, such as Saudi Arabia and Israel. A second British passport carries a different passport number and it is not a duplicate passport. It is valid for 10 years from the day of issue and can be renewed if the traveller is still in need of one. Getting a second UK passport online.