Couchsurfing and other hospitality networks allow you to sleep for free in other member's homes
2,400 members—though U.K. coverage can be spotty, with just 68 members in England.
Membership: $65 for a downloaded directory; $80 for a print version. Plus $15–$30 gratuity for your hosts.
Requirements: Must be over 40; must agree to host.
An acutal UN-accrecited NGO devoted to fostering world peace through travel.
Membership: Free, buy you must submit two letters of recommendation snad undergo an interview.
2,100+ members in 86 countries, including 400+ in the U.K.
Membership: Recommended donation of £37, with annual renewal fee of £27.
Requirements: Must be female and over 18.
500 listings in 30 countries.
Membership: €25. No fee, donation, or gratuity for hosts.
Requirements: It doesn't say you have to be gay, but I assume that's a bit of a given.
The Queen doesn't need a passport. Since all British passports are issued "In the name of Her Majesty," the Queen can just vouch for herself—though her husband Philip, son Prince Charles, and everyone one else in the household do have passports.