Hi McG
This doesn't match with Fred's age in his WW1 service records, or in the newspaper article that Merlin found..but as I see that his father's name was Robert (and he had a sister Katherine) I can't help but think that this imight be your family in the 1901 census:
RG13; Piece: 3439; Folio: 129; Page: 38
58 Wendell Street, Toxteth Park
Robert Yeowart, 37, Insurance Agent, b. Liverpool
Rosina S Yeowart, wife, 35, b. Liverpool
Frederick S Yeowart, son, 15, Office Boy (Cotton Brokers) b. Liverpool
Kathrena Yeowart, dtr, 13, b. Liverpool
Gertrude Yeowart, dtr, 11, b. Liverpool
Charles Yeowart, son, 9, b. Liverpool
Florence Yeowart, dtr, 7, b. Liverpool
Dazey