Examples are to be found in the UK including
Greyfriars Kirk,
Edinburgh;
St Peter Mancroft,
Norwich;
Orford parish church (formerly at the
Turner Sims Concert Hall,
Southampton)), and
Fitzwilliam College Chapel, Cambridge. His largest organ was built for
St David's Hall, Cardiff (subsequently rebuilt in part by
Walker). A notable commission was for the
St Albans International Organ Festival (IOF), with which Collins was associated for some time; the IOF organ (sited in St Saviour's church) was built in 1989 in the style of
Andreas Silbermann (1678–1734).
Peter Hurford, who founded the IOF while he was organist of
St Albans Cathedral, played commissioning recitals on a number of Collins organs, and also recorded on some of them. ==Organs in other countries==