Fiona Valpy 2.

Fiona Valpy describes her inspiration and research into her latest book, 'Sisters of the Midnight Sun' - from plunging into the Arctic Ocean for a swim, experiencing Up Helly Aa in Shetland with fearsome (but pretend!) Vikings, uncovering the symbolism of a wearing a paperclip in a lapel, embroidered daisies, and uncovering the bravest of nearly forgotten heroines and seafarers of WW2 in the unforgiving North Sea.