From 1 October 2015 British visitors need a visa to enter Malawi. Details of the application process can be found on the website of the Malawian High Commission in London.
Most visits to Malawi are trouble-free, but you should take sensible precautions to protect yourself from muggers and bag-snatchers. Most thefts from visitors take place around the main bus stations in Lilongwe and Blantyre. See Safety and security
There is a low threat from terrorism. See Terrorism
Take out comprehensive travel and medical insurance before you travel.
Source Article from https://www.gov.uk/foreign-travel-advice/malawi