State Rep. Denise Provost, D- Somerville, has been invited by the British Consulate in Washington, D.C., to join a government delegation traveling to Great Britain this month. The purpose of the trip is for state legislators from the United States to learn about initiatives by the U.K. and European Union to address climate change through a variety of legislative and public-policy measures. Provost, representing Massachusetts, will join state representatives and state senators from Maine, Michigan, Washington and Oregon for an intensively scheduled program of meetings, briefings and site visits.