I intended to go to Chelsford yesterday for the eve of St Norbert, I didn't manage it but Fr Hugh, the Prior directed me here for pictures.
I think it is Roman Rite, the ancient Premonstraterian or Norbertine Rite was very similar to Rite of Cluny with deacon's circling the altar with censors. Corpus Christi had three Benedictions of the Blessed Sacrament during the Mass itself, as well being celebrated before the exposed Blessed Sacrament. Splendid!
Recently Ecclesia Dei said Summorum Pontificum applied to the Ambrosian Rite and therefore presumably other Latin Rites, including those of religious orders, and maybe even the Sarum Rite. Glorious!
Happy St Norbert's Day!