Private Richard Saint S/8956 1st battalion Queen's Own (Royal West Kent Regiment)
http://www.cwgc.org/find-war-dead/casualty/921224/SAINT,%20R...The Mons Star is the unofficial nickname of the 1914 star. He also received the British War Medal and the British Victory medal aka the Inter Allied Victory Medal.
They would have been mailed to his next of kin and the surviving paperwork shows that they were received by his father at number 4 Tolhurst Street, Brockley, London.
https://en.wikipedia.org/wiki/1914_Starhttps://en.wikipedia.org/wiki/British_War_Medalhttps://en.wikipedia.org/wiki/Victory_Medal_(United_Kingdom)
Sometimes medals were pawned or sold because of financial need, otherwise they qould usually be eventually bequeathed to the next surviving male family member, or if there were no males, to a female member.
Medals would often be melted down for their scrap value, there was a huge rise in the price of silver in the 1970's and a lot of British War Medals, which contain an ounce of silver, were melted down at that time for their bullion value.
They do sometimes turn up though on medal dealing sites, and all three medals will be inscribed with his name, rank, unit, and service number.