From their Notices page:
This coming Saturday (15th January) at 10.30am in Westminster Cathedral, three former Anglican bishops are to be ordained as Catholic priests. This is the first step in the formation of an Ordinariate for those want to come into full communion with the Catholic Church while retaining certain characteristics from their past. There is an open invitation to everyone to attend Saturday’s Ordinations. The weekly magazine “The Tablet” has come up with the suggestion that Saint James’s would be a suitably central venue in which the Ordinariate might find some space – it should be emphasised that this is a product of The Tablet’s fertile imagination!