The original late 12th-century church was dedicated to St Thomas of Canterbury (Thomas Becket) (1118–1170).
  Later, under the rule of King Henry VIII of England (1509–1547), when Becket was declared to have been a traitor, the Canterbury part of the name was dropped.
Its name and the ambiguous dedication to St Thomas was thereafter, over time, assumed by many to refer to Thomas the Apostle.

From the 18th century its deterioration made any renovation futile, and funds were raised for a new church on its site.
The new church was built over the years 1854 and 1855 to a design by the architect S. W. Dawkes of Cheltenham.
 Reflecting the building's history, but arguably unusual, the new church was dedicated on the feast of Thomas the Apostle to both him and St Thomas of Canterbury.
The tower contains a ring of 12 bells.
 
To honour its importance in Island and civic life, but conferring no official status within the Church of England itself, the church was designated as a Minster at Easter 2008 by its diocesan bishop Kenneth Stevenson, Anglican Bishop of Portsmouth.
The original late 12th-century church was dedicated to St Thomas of Canterbury (Thomas Becket) (1118–1170).   Later, under the rule of King Henry VIII of England (1509–1547), when Becket was declared to have been a traitor, the Canterbury part of the name was dropped. Its name and the ambiguous dedication to St Thomas was thereafter, over time, assumed by many to refer to Thomas the Apostle.
From the 18th century its deterioration made any renovation futile, and funds were raised for a new church on its site. The new church was built over the years 1854 and 1855 to a design by the architect S. W. Dawkes of Cheltenham.  Reflecting the building's history, but arguably unusual, the new church was dedicated on the feast of Thomas the Apostle to both him and St Thomas of Canterbury. The tower contains a ring of 12 bells.  
To honour its importance in Island and civic life, but conferring no official status within the Church of England itself, the church was designated as a Minster at Easter 2008 by its diocesan bishop Kenneth Stevenson, Anglican Bishop of Portsmouth.
Sts Thomas Minster