I am enormously grateful to Christine Carver (who is a Purssell cousin) for her help in identifying these photos. She wrote this back in June 2015.
“I have an enormous pile of photos of the family given to me by my father I got him to write names on the back but a lot of them are badly faded. However I have managed to identify yours. With help from papers given to me by his sisters Noella mentioned in the letter from Ursula, and Awdry who did a great deal of research without help from the Internet ! Ursula was the 3rd daughter of Laura Mary Clare who was Alfred’s eldest daughter by his first wife.Ursula was born 1894 and died 1974, not married. Laura Mary Clare was married to Max Winstanley.”
Back to your photos:
The young man with folded arms was Alfred Joseph eldest son of Alfred, born 1867, died1931. He was a stone mason and imported large quantities of Italian Marble which was sold for various buildings in London, including Brompton Oratory .He had a partner in his business Wilfred McEvoy.
The young lady with her hair tied back and dark, gathered sleeves is Charlotte, younger sister to Alfred J. born 1869 married to Wilfred Parker 1898. I also think it is her with the bridesmaids present around her neck?
The one with the hat and high collar is Agnes born 1871 married Edmund Bellord 1890.
And the other two ,the lady with the comb in her hair and the one covered in forget-me-nots are Lady O B.
In addition, I am very grateful to Nicholas Bellord (Agnes’s grandson) for the following additions.
My guess at this one 
is that it is Frank Purssell with his sisters, rather than Alfred.
Then there are two of Agnes with her son Charles
