Title is what you get. You always know that the ex is going to dominate the whole. That's the end of the predictability. The psycho-emotional roller-coaster takes you where you don't particularly want to go. Both the trendy Docklands set and the grey, half-out-of-body territory of soul pain are settings that will hold you and keep you uncomfortable.
Lily has never experienced pure fear. She thought she had, but now realises that it was some weaker, poorer relation of what she is feeling now. Pure fear is clean, flawless and contourless, almost tipping you over into the sensation of nothing at all. It doesn't so much take over your whole body as deprive you of one.