Orbital are an English electronic music duo from Otford, Kent, England, consisting of brothers Phil and Paul Hartnoll. The band's name is taken from Greater London's orbital motorway, the M25, which was central to the early rave scene during the early days of acid house. Additionally, the cover art on three of their albums showcase stylised atomic orbitals. Orbital have been critically and commercially successful, known particularly for their live improvisation during shows. They were initially influenced by early electro and punk rock.

The M25 or London Orbital Motorway is a major road encircling most of Greater London. The 117-mile (188-kilometre) motorway is one of the most important roads in the UK and one of the busiest. Margaret Thatcher opened the final section in 1986, making the M25 the longest ring road in Europe upon opening. The Dartford Crossing completes the orbital route but is not classed as motorway; it is classed as a trunk road and designated as the A282. In some cases, including notable legal contexts such as the Communications Act 2003, the M25 is used as a de facto alternative boundary for Greater London.