Allegedly, some English seminarians in Oxford wrote to the local ordinary and received permission to say it in private within the seminary. Not sure any more details than that, though you might try finding the anecdote on the Traditionalist blogosphere in England and write to them and ask to attend.
I am dubious about this anecdote however, despite several traditionalist friends having recounted it to me. I don’t believe the bishop has the faculty to reinstate a rite that is no longer in use.
The Sarum Rite ceased to exist entirely after the English reformation, as from the 1600’s to the 1850’s all English Catholic priests were trained and equipped with missals etc. in France and Italy, and as such were trained in the Tridentine Rite, which meant that the Sarum rite ceased to exist. As I understand it, if a rite is no longer celebrated validly anywhere in the Church, that rite cannot then be revived.