Tunisian visas require an approval from the government in Tunis. The approval process typically takes 4-6 weeks, however, in some cases the process can be extended by several weeks.
Visa validity will be based on applicant's itinerary.
Tunisia tourist visa is not required for citizens of United Kingdom for a stay up to 90 days.
All travelers will need a passport valid for at least 90 days following your departure date from Tunisia. However, we strongly recommend traveling with 6 months validity on your passport at all times. Citizens of United Kingdom can refer to www.ips.gov.uk for forms and instructions for new passport applications and British passport renewals.
Most destinations, including Tunisia, require that you have adequate un-used pages in your passport, allowing for any necessary stamps upon arrival and departure. We recommend that you have at least two free pages in Visas section of your passport before any international travel. British citizens can get extra passport pages added to their passports at www.ips.gov.uk.
Check with your airline in case you have connecting flights overseas as part of your journey to Tunisia. It may be the case that countries you pass through en route to your destination may require a separate transit visa. Please refer to visa requirements of the specific country.