The Two Filberts on Jumbo, Hayes and Croft on Coliseum, The Elliotts on Edison Bell Winner and Fanning and Fortune on Guardsman. Actually they were Harry Cove and Will Thompson.
The Coliseum list on Mike Thomas' mgthomas.co.uk website identifies Arthur Osmond as a pseudonym on this disc for Arthur Gilbert, and Hayes and Croft as a pseudonym for The Two Filberts.