29/10/1986 Margaret Thatcher opens the last stretch of the M25 motorway
M25 Opening | Prime Minister Margaret Thatcher | Thames News Archive Footage
The M25 is a 117-mile motorway that encircles almost all of Greater London. It is one of the busiest of the British motorway network and is known for frequent traffic jams. After the Berliner Ring, which is 122 miles long, the M25 is the 2nd longest orbital road in Europe.