The Church of St Mary Magdalene is a ‘Forward in Faith’ parish within the Church of England. Forward in Faith was formed in the early 1990’s and is a traditionalist or conservative catholic organisation within the CofE. Their initial main reason for being was the opposition of the ordination of women to the Priesthood. FinF parishes are overseen by ‘Flying Bishops’ rather than the regular Diocesan.
FinF parishes tend to be liturgically/doctrinaly advanced Anglo-Catholic in nature. Within the CofE, they are the most likely to go over to the Ordinariate. Some have, although several remain. As an Anglican, I wonder why some of these FinF parishes remain in the CofE - some don’t use the official Anglican formularies but use the Ordinary Form of the Roman Rite or perhaps the English Missal or some other hybrid rite. This particular parish seems to have introduced the Diine Mercy Chaplet as a public devotion. I too am perplexed by such parishes. To me, they seem to be on the fence or in some kind of limbo - neither Anglican or Roman Catholic and unwilling to fully commit to one or the other.
The inclusion of several Roman Canonised Reformation/post Reformation Saints into the Anglican Calendars is a fairly recent thing. GKC’s linked post explains why. Notice they are not actually referred to as ‘Saints’. Their inclusion is regarded as controversial by Evangelical/Low Church Anglicans who see the influence of Newman/Oxford Movement/Ritualism as an infection in the CofE.
(As an aside, GKC has muddled his Charles’ in his linked post - it was Charles I who was canonized by Convocation of the CofE according to pre 10th century custom).