Eucharistic Validity

The I worship at a cathedral which means that various different people oversee the eucharist, one of which, is staunchly evangelical. It is to the point that he (presumably on purpose) does not follow the proper rituals for the blessing of the sacrement (doesn't genuflect after the consecration, doesn't hold up the elements to present to the congregation). However, he was of course validly ordained as a priest in the CofE so still has apostolic succession. Would this be considered a valid eucharist? What are the requirements for a valid eucharist? Thanks all and God bless!