After the war, he resumed architectural practice and was elected
FRIBA in 1946. Matthews had also served in the Royal Engineers, seeing service in Italy and the Western Front. The Piccadilly Plaza is now considered by some to be an exemplar of modernist architecture. By 1960 the practice had become "
Covell Matthews and Partners" and it expanded rapidly over the following decade, with Brian Falk and John Wheatley joining the practice during this period. Covell himself was elected
FRIAS in 1965. However work in England continued including the residential estate at
Bar Hill, Cambridge, and a pub in
West Ham in 1968.
Churches Covell undertook work on several churches, predominately on behalf of the
Diocese of Southwark where the practice is associated with 23 church buildings. In 1956 Covell designed
St Agnes, Kennington Park as a replacement of the original 1874-7
G. G. Scott church following its demolition due to bomb damage. Covell's church included a baptistry beneath a west gallery; north-east lady chapel; vestries and office/meeting room accessed via corridors and a hall complex all set in a small churchyard. A more modest project was the 1958 parish hall in
Charlton, London on the site of the former Sundorne Mission Hall in Swallowfield Road, used by
St Luke with Holy Trinity church. The church of St Matthew,
Camberwell, was also a Covell-designed replacement for a previous church in Denmark Hill that had mostly been destroyed during a bombing raid on 26 September 1940. Building work commenced in 1959 and was completed in 1960. St. Katharine with St. Bartholomew Church,
South Bermondsey, built in 1960, replaced a former church, bomb-damaged in 1940, and demolished in the late 1950s. Covell's design re-used the basement of the former church. It features zig-zag walls around the nave, a copper-covered nave roof, with abstract
dalle de verre windows by
W. T. Carter Shapland. Covell continued the use of dalle de verre and copper roofing at
St Richard's Church, Ham, completed in 1966, the glass this time designed by
Henry Haig. The church features a
Star of David plan creating a hexagonal central space for worship and a matching hexagonal
font.
Henry Haig provided the dalle de verre windows. Covell continued the open interior and copper roof themes with the octagonal William Temple church,
Abbey Wood, also built in 1966. Covell also designed the
font and again commissioned glass from Shapland. The
Church of St Laurence, Catford, built in 1967–8, repeated these themes: an octagonal church with peripheral vestries and other ancillary rooms and a pentagonal
Lady Chapel also used as a community centre. Both have exposed reinforced concrete frames which continue over the church to form a
corona and to a spirelet with a single bell over the chapel. The dalle de verre glass was Covell's third and final collaboration with Shapland. The church also features further dalle de verre work by
W. T. Carter Shapland. The buildings were listed
Grade II in 2010. Covell was a keen organist, playing at St Agnes, Kennington Park. He was also involved in the replacement of the organ in the
Royal College of Organists in 1967. ==Retirement and death==