Hi Liz
It would be my grandparents

John Edward Mitchell born about 1880 in Edinburgh and my grandmother Olive Cowley
born 1900 in Douglas

I checked the 1911 IOM census but couldn't find John , Olive was living in Manchester
I have found John on the IOM in 1891 & 1901

But by 1923 when they married they were living in the IOM she was living in Athol Street and john was living in Strand Street
So i am looking at about 1921 for Olive and any date at all for John

Hope you are keeping well
Best Regards Lesley