Professor Martindale Sidwell FRCO (23 February 1916 – 20 February 1998) was an English organist, composer and teacher.
He was born in Little Packington, Warwickshire on 23 February 1916, the son of John William, a musician. At age 7 he joined the choir at Wells Cathedral, and later became sub-organist. He was awarded ARCO in 1936 and FRCO in 1938.
During the Second World War he served firstly with the North Somerset Yeomanry and later with the Royal Engineers. Invalided out he became temporary organist at Holy Trinity Church, Leamington Spa and director of music at Warwick School.
He studied at the Royal Academy of Music with C.H. Trevor.
In 1944 he married Barbara Hill, a pianist and harpsichordist.
- Sub Organist at Wells Cathedral 1932 - ????
- Temporary Organist at Holy Trinity Church, Leamington Spa
- Conductor of the Leamington Spa Choral Society
- Organist of St John-at-Hampstead 1947 - 1992
- Organist of St Clement Danes 1957 - 1992
- Conductor of the London Bach Orchestra 1967 - 1981
- Conductor of Hampstead Choral Society 1946 - 1981
- Conductor of the Martindale Sidwell Singers 1956 - 1992
- Organ tutor at Trinity College of Music and Professor of Organ at the Royal Academy of Music 1963 -1984
- Professor at the Royal School of Church Music 1958 - 1966
He composed one piece which remained unpublished in his lifetime, a Festal Jubilate for choir and organ. A number of Anglican chants by him are still in the repertoire of some Cathedrals and major churches.
He was one of the editors of Secular and Sacred Music published in 1966.
- The Independent. 25 February 1998
- Organists' review - Volume 84, issues 329-332 – p.124. Incorporated Association of Organist. 1998
- Western Daily Press - Friday 24 January 1936
- Western Daily Press - Monday 31 January 1938