As the Church of England website explains, in the season of Lent:
Liturgical dress is the simplest possible. Churches are kept bare of flowers and decoration. Gloria in excelsis is not used. The Fourth Sunday of Lent (Laetareor Refreshment Sunday) was allowed as a day of relief from the rigour of Lent, and the Feast of the Annunciation almost always falls in Lent; these breaks from austerity are the background to the modern observance of Mothering Sunday on the Fourth Sunday of Lent.
Advent is a season the church calendar with a similar quality:
The characteristic note of Advent is therefore expectation, rather than penitence, although the character of the season is easily coloured by an analogy with Lent. [...] Church decorations are simple and spare, and purple is the traditional liturgical colour. [...] The Third Sunday of Advent was observed in medieval times as a splash of colour in the restrained atmosphere of Advent (Gaudete or ‘Rose Sunday’), and the last days of Advent were marked by the sequence of Great ‘O’ Antiphons, which continue to inspire modern Advent hymns and meditations.
Is Gloria in Excelsis - according to official guidance - omitted by the Church of England in Advent? I am looking for a specifically Church of England answer, rather than answers from worldwide Anglicanism or Roman Catholicism.
