This plaque was correctly identified by Pat as being on the Lych Gate at the Church Cemetery, Dyserth Road.
The second plaque was not identified. It is in the Botanical Gardens, see photographs:
This plaque is a memorial to King George V who died on January 20th 1936.
In “The Bulletin – the changing fortunes of the Botanical Gardens” by Glynis Shaw:
http://www.whgt.org.uk/documents/bulletin/bulletin52.pdf
it says “In October 1936 Rear Admiral R. Rowley Conwy C.M.G., Lord Lieutenant of the County, requested that a fund be established for a National Memorial to the late King George V” and “a further two-acre Memorial Garden with a bandstand was to be made by Madryn Avenue”. Has the plaque been re-sited? Does anyone have any memory of the Memorial Garden for George V?
George V became King in May 1910 when Edward V11 died. There were Silver Jubilee celebrations in Rhyl in May 1935. The King died within the year in January 1936.
From The Programme of Festivities in Honour of the Silver Jubilee of H.M. King George V.