,Just thinking about Marika's real name
Maybe it's Marika Capaldi :3 I don't know if it's true, but she's done 2 songs for Delta, such as ''Stay With Me'' and ''Forget My Heart'', plus they both are produced by Morris Capaldi (with Silvio Moretti for ''Forget My Heart'') 
https://www.youtube.com/watch?v=q9v34KWjrkU
https://www.youtube.com/watch?v=-bEfcEsLayc
I can't confirm it, it's only a supposition