"If you're involved in any political activities in Nepal you may be liable to penalties including deportation and/or a fine," a travel advisory said.
Stating that disagreements arising from Nepal's new constitution have led to protests, rallies and strikes throughout Nepal, the UK administration has advised its citizens to "monitor the local media and follow the advice of the local authorities and concerned tour operator before planning visits."
"Protests can occur at short notice and turn violent. Clashes between protesters and police may occur anywhere. Stay away from protest areas," the advisory said.
The travel advisory comes few days after a Briton was arrested for participating in the protest organised by Madhesis and ethnic groups and was handed over to British mission in Kathmandu.
Meanwhile, some 500 protesters held peaceful protest at Maitighar Mandala near Singhdurbar Secretariat, the country's main administrative centre in the capital, as part of their second phase of protests.