Hi
My great aunt Annie Mortimer m. Sam Mortimer who was born in Bradford ca 1848. Sam  a stuff merchant  lived at 57 Ash Grove Bradford.  He died 11 January 1901 aged 52 by which time he had remarried and lived at Final Royd, Birkenshaw,  Yorkshire.    I have not heard that he was a musician.
His twin son Reginald Andrea MORTIMER married Annie CROMPTON 3 April 1920
at Little Horton Congregational Church, Horton Lane Bradford.  I have not traced any children. I have no idea if he bought  Leeds Hall after WW2.  I have heard there was a football referee called Reg Mortimer but again I do not know if my relative was the same man.
Sorry I have no more information about Reginal Andrea.  Regards,  Babs