Neither Ernest Stanley Clarey nor Gwendoline Constance Clarey is listed in the IOM burial index, so the possibilities are:

1) they are now in their 90s
2) they have died in the years which aren't covered by the burial index (post 1980 ?)
3) they are buried off the island---maybe they emigrated ?
4) Gwendoline could have been widowed and had a second marriage, so could be in the index but under a different surname.

Jean C