16 September 1915 The first Womens Institute meeting in the United Kingdom took place at Llanfairpwll on Anglesey, Wales.

JERUSALEM
“Although it was never adopted as the WI's official anthem, in practice it holds that position, and is an enduring element of the public image of the WI.” -Wikipedia

And Did Those Feet In Ancient Time, from Wikipedia     https://en.wikipedia.org/wiki/And_did_those_feet_in_ancient_time
Many recordings of “Jerusalem”on YouTube     https://www.youtube.com/results?search_query=jerusalem+song