The first, a Missa Cantata which was sung in Belmont Abbey, with Fr. Ignatius Harrison, Provost of the London Oratory as celebrant. Fr. Finigan reports there was a schola of three, made up of two monks and Fr. Andrew Wadsworth.
Read more about this here.
The second Mass Fr. Finigan tells us of, occured at St. Francis Xavier in Hereford, and was a Solemn Mass. Fr. Ignatius Harrison was again the celebrant, Rev. Dr. Laurence Hemming the Deacon and Fr. Finigan himself the subdeacon.
More here.