This took place yesterday as advertised. The Traditional Mass has been taking place twice a year in this historic Catholic chapel for some time; this was the first occasion it was sung. It is hoped that there will be more frequent sung Masses in future. The chapel is closely associated with Bishop Challoner, who consecrated it and was buried nearby until his body was moved to Westminster Cathedral. It contains some of his possessions, including a chalice.
The house itself is open to the public; see their website.
The celebrant was Fr Andrew Southwell.