I was first given this by my friend Elizabeth who bought it at Books Peckham, an excellent second hand bookshop in South London (highly recommended!) run by another old friend, Peter Willis. It’s homemade by a woman called Sophie and contains Lavender, Clary Sage, Majoram, Mugwort and Roman Chamomile. I realise this is quite a mysterious description but if you find yourself in London go to Books Peckham and it will be there. It makes a tour bus smell like home! And when you are staying in a different bed every night it offers a familiar and heady smell to fall asleep to.