Hi Sara,
If your Grandfather and Henry Folland were close associates, then it is likely that he would have attended Henry Folland's funeral. Sometimes local newspapers would list some of the more prominent people who attended a funeral and who they were eg: John Jones, manager of so and so works. I'm wondering whether you'd find some clues in either the Cambrian or Western Mail archives from Swansea Library. I'm not sure when he was buried unfortunately as he died in Egypt on 24th March 1926, and his remains were brought back to Swansea for internment.
Likewise, your mum may have attended Mrs Follands funeral which took place on 21st March 1957 and the same papers may hold some clues for you. Both are buried at Oystermouth cemetery.
I have checked our local newspaper archives and I'm afraid that on this occasion, the funerals were not covered. Good Luck with your research.