These are Dune’s ‘Heartstring’ design, which are part of Dune’s wedding collection and are still available on Dune’s website.

Designer/Brand: Dune
Shoe Size: UK 7
Main Colour: Ivory
Style: ballet flats
Shoe Width: Standard
Heel Height: Flat (less than 0.5")
Upper Material: Lace
Country/Region of Manufacture: Unknown