Have found marriage.
615/00//0043 23 September 1931, Stevenston
William Frame Little and Janet Brown Clark.
I searched on surname Clark and First name jan* Brown
No wonder it was difficult to find - the name Little is missing on the marriage search returns, only the female name showing. I would write to SP for all your marriage searches under Little and ask for a refund on those searches.
Liz
PS found Janets birth which aided with the above if you PM me I will try and copy and paste it to you.