At the first Anglo-Catholic Priests' Convention in 1921, the Principal of Chad's, Durham, said:
Let us remind ourselves that the grand possession of Western Christendom, this great prayer, the Canon of the Mass, this noble Consecration prayer, for at least 1300 years, intact and immutable, formed the basis of the Western Rite.Without exaggeration we may describe it as the oldest liturgical prayer in Christendom. Through all the middle ages our English Rite followed it. It is free from anything that implies any mediaeval developments of eucharistic doctrine. It stands unaltered in the Roman Mass of today. It is our inalienable heritage as priests of the Church Catholic in the West.
(I have edited this in the interests of brevity.) The 450th anniversary of the proscription of this prayer by statute - a stutute explicitly resisted at the time by Convocation and the Universities - is the moment to parade with pride in our churches our "inalienable heritage", the First Roman Eucharistic Prayer.