Not much help but I found these details.....
Happy valley llandudno
1873 - the “Nigger Minstrels” arrive
1886 - Joe Perry takes over with his Happy Valley Minstrels, not blacked up! A primitive stage is built. He performs with his troupe for 19 years
1904 - Perry dies but his troupe struggles on for a further year
1906 – one of Perry’s players, Will Churchill, sets up his own minstrels, with blacked up faces. A stage is erected in the form of a castle. Dressing rooms are provided. Entertainments are mainly songs, ballads, ditties and verses
1930 - Roy Cowel with his “Cowel’s Querries” end the tradition of blacking up. His show has ladies in it, with dancing added to the mix