British Nationals do need a visa to travel to India. If you are of Pakistani Origin, please make sure you read the information here before applying: https://www.gov.uk/foreign-travel-advice/india/entry-requirements
Visas are unavailable on arrival and therefore, must be obtained in advance.
The visa that you need is the ‘e-Tourist Visa (30 days)’. You should check carefully whether you’re eligible for an eVisa before you apply. British subject, British protected person, British overseas citizen, British national (overseas) and British Overseas Territories citizen passport holders aren’t eligible to apply for an eVisa.
Detailed information on other visa types are available here: https://www.hcilondon.gov.in/page/general-visa-information
You can apply for your eVisa 120 days (maximum) and 4 days (minimum) before your flight. In order to avoid any complications with the visa process, you should be applying for your visa as soon as you are eligible i.e. 120 days before your flight. During the application process, you will be asked to provide the date of entry into India - your visa will then be valid for 30 days from this date.
You’ll need to apply online for your e-visa: https://indianvisaonline.gov.in/evisa/tvoa.html. The service costs around $40.
Ensure you have thoroughly read all the information on the webpage before sitting down to start the application process. The documents required for completing the eVisa application are indicated against each type of eVisa, you should have all these documents to hand before beginning to fill in your eVisa application.
You can use the below information to help you fill out the application form:
India Himalaya – Spiti Valley:
Ecosphere, Old Bazaar, Kaza – 172114, Spiti - Tel: 0091 9418 860099
India Himalaya - Leh:
Rimo Expeditions, Hotel Kanglhachen Complex, Leh 194101 - Tel: 0091 1982 253348
India South, Chennai:
YWCA International Guesthouse, 1086 Poonamallee High Road, Chennai - Tel: 0091 442 532 4234
India South, Kochi:
John's Residency, TD Road, Shenoys, Ernakulam, Kerala 682011 - Tel: 0091 484 235 5395
Outlook Expeditions, Adventure House, 20 St Johns Road, Penn, Buckinghamshire, HP10 8HW - Tel: 0044 1248 672770