Can I recommend this excellent and fascinating article to you, published in the report of Trinity College Oxford and starting on page 83. Written by Fr Matthew Rushton, it's a fascinating account of the college chalice and paten, presented to the college by its founder Thomas Pope in 1556. The chalice and paten, which dates from 1527, were long believed to have been in the possession of St Alban's Abbey before the abbey was dissolved. Although Fr Rushton says the evidence for this tradition is rather inconclusive, Thomas Pope was one of the commissioners charged with the dissolution of the abbey and would no doubt have benefitted from its despoliation. So, there is a fair chance the chalice and paten were monastic booty. Very little has been written on late medieval English metalwork, so this is a very welcome addition to the literature.