The purpose of Protect is to strengthen protection against terrorist attacks in the UK or its interests overseas and thus reduce vulnerability. The work focuses on border security, the transport system, national infrastructure, and public places. The process works by first recognizing the threats and then identifying the measures to reduce risks. An example of 'Protect' are the large bollards placed strategically around busy city centres, and especially on bridges, to prevent the rise of vehicle-based attacks such as the 2017 London Bridge attack.