Some of you will remember the scuffle some years ago, when scarlet cassocks were declared to be the privilege of Chaplains to the Monarch here in the UK – and choirs of the Chapels Royal/ This caused a certain amount of consternation, for many churches had put their choirs and servers into red cassocks.
I remember at St Margaret’s Leytonstone, where I did my second curacy, that the servers wore red cassocks through the year, but changed into black for Advent and Lent. (And I think they had special cottas trimmed with crocheted lace for high festivals).
I have a set of postcards, published by Mowbrays in the 1930’s. The series is entitled Beyond the Veil and is a depiction of High Mass as celebrated in the approved Anglo-Catholic manner. The servers are in red cassocks with zuchetti or skullcaps. That I have never seen.

A friend of mine recently described me as a ‘Dearmer fundamentalist’ and it will be no surprise to readers of my blog that I still think that many of the insights of the early 20th century liturgist and Anglican priest Dr Percy Dearmer well worth considering.
Here is Dearmer on red cassocks: ” Black cassocks look far better than red ones, which play havoc with the general effect of colour, and besides, cannot be worn with albes (sic). Dr W Legg denies that red cassocks are sanctioned by English tradition at all, and so experienced an ecclesiastic as Cardinal Manning spoke gravely of their bad moral effect. “
Beat that!
When I served at Portsmouth Cathedral (Anglican!) in the early 1980s the choir wore red cassocks. The then Provost, David Stancliffe, got away with it by arguing that the colour was ”brick” rather than red, to match the west wall of the still incomplete building.