Lay a length of string twice the length of the turkey fillet on a chopping board. Arrange 4 more lengths of string large enough to tie around the width of the fillet at intervals across your first string, winding each one around the main string once so they don’t move around too much. Lay 8 rashers of bacon, across the main string and running in the same direction as the 4 strings, overlap the rashers slightly so they don’t pull apart when you wrap the turkey. Scatter with 1 tbsp of the thyme and grind over some black pepper.