Around 2.1 million British nationals visit Portugal every year. Most visits are trouble-free.
Beware of street crime. Thieves tend to target money and passports so don’t keep them all in one place. See Crime
Walking the levadas (ancient irrigation channels) is a popular activity in Madeira, but the walks can be challenging if you are inexperienced. See Local travel - Madeira
There is an underlying threat from terrorism. See Terrorism
The Overseas Business Risk service offers information and advice for British companies operating overseas on how to manage political, economic, and business security-related risks.