Guessing photo was taken circa 1927; so the ages below are based on that year.

Top Row Left to Right, and their relationship to Philip Grubham [my Great Grandfather]
Mabel Grubham [age 19] [Parents: Harry & Alice Grubham - Son & Daughter-in-Law]
Reginald Lloyd Jones [age 23] [Parents: John William & Lucy Jones - Son-in-Law & Daughter]
Esther Elizabeth Flowers [age 50] [Daughter]

Middle Row Left to Right
Fanny Berry [age 80] [Sister-in-Law]
Philip Grubham [age 81]

Bottom Row Left to Right
Mabel Lloyd Hayward [age 10] [Parents: Charles & Fanny May Hayward - Fanny was the sister of John William Jones]
Doris Eliza Jones [age 18] [Parents: John William & Lucy Jones - Son-in-Law & Daughter]
Doris Winifred Hayward [age 7] [Parents: Charles & Fanny May Hayward - Fanny was the sister of John William Jones]

Philip Grubham, b. 9th May, 1846. -  d. 17th April, 1934.
Fanny Berry [sister-in-Law] b. October 1847.
Esther Elizabeth [Grubham] Flowers [later Wootton] [Daughter] b. 15th April, 1877. - d. 1947.
Reginal Lloyd Jones [Grandson] [Brother of Doris Eliza Jones] b. 12th April 1904. - d. 1970.
Mabel Grubham [Grandaughter] [Cousin to Doris Eliza Jones] b. 12th November, 1908 - d. xxxx
Doris Eliza Jones [Later Holland] [Grandaughter] b. 14th May 1909. - d. 27th November, 1974.
Mabel Lloyd Hayward [Later Ganderton] [Cousin to Doris Eliza Jones] b. 10th April, 1917. - d. 20th June, 2002
Doris Winifred Jones [Later Bayliss] [Cousin to Doris Eliza Jones] b. 18th May, 1920. - d. 1986

Mabel and Doris would have just come to live at the Post Office at Knightwick with their uncle and aunty, John William & Lucy Jones. This was due to something happening in their family, perhaps the death of their father. They stayed there until they married their respective partners. While their elder sister Nora Mary Hayward stayed with her mother Fanny May Hayward [nee Jones] who remarried to Joseph Petty on the 3rd December, 1928, in Bromyard.
In the photo they all look smart enough for it to have perhaps of been that day!