Hello, it's been almost a year since you were on this site enquiring about the Royal Oak Inn. I've only just registered today so hopefully this information will reach you.
Bryn Ellis helped me immensely a few years ago providing information on my step-grandmother, Megan Evans, who grew up in the area before marrying my grandfather and moving to Flint. The information Bryn provided stated that Megan's father, John Ellis Evans, took over the tenancy of the Royal Oak in 1912 and then the licence was transferred to Megan's mother, Margaret Evans, in 1924. As you know, the Royal Oak was closed in 1938.
Hope this helps!