I have just been looking at the Chambers tree on Ancestry. It says Beryl was born 1931 (correct) and died Kington 1952 (incorrect)
The 1933 birth is shown as GW instead of WG and the death in 1986 as GW
It shows Evan's birth as 10.1.1927 but his birth was registered December qtr 1927
Beryl Jones 1931-1952. - Died without Marrying. - my grandmother stayed in touch with her.
Your gran was born 1934 so would only have been 18 if Beryl died in 1952.
I really think you need to ignore some of the info on the tree or ask the owner to prove their "facts" by producing BMD certs in support of the info they have posted