Hello Colin, their marriage was found by MaryM,

www.isle-of-man.com/genealogy/messageboard/manx_archive_2.pl/pro/search/pmd/sread/srchid/1805493pykaHKomMA9BR1345261591/spage/1/sanc/520070/sbid/12/md/read/id/520219

www.isle-of-man.com/genealogy/messageboard/manx_archive_2.pl/pro/search/pmd/sread/srchid/1805493pykaHKomMA9BR1345261591/spage/1/sanc/520070/sbid/12/md/read/id/520271

The Quayle / Clarke marriage took place on ----
June 20th , 1916.

Quayle / Clarke marriage found. GERMAN parish------ page 268/2
Philip / aged 30 / widower / from Greenock/ warehouseman / father Philip a platelayer
Frances/ aged 29 / widow / father Philip Shimmin/ a
fisherman. She lived at 16, Stanley Road, Peel.

The ref. I gave you is the Registrar's----
German [parish ] page 268 /2