The Dunnock, or Hedge Accentor has a repertoire of about 6 different songs. Unlike most birds, the song is not used to attract females to a male territory, as females set up territories independently. The males then compete for the females in these territories (Apr, Norfolk).
This is an aberrant song, recorded in June, 1979, in Hertfordshire.
The alarm call is pipe-like (Dec, Herts).
It may be doubled (Dec, Herts).