There is an interesting programme on Radio 4 at 11:30 p.m. this evening and subsequent evenings this week.
It is called White Nights.
Each night a different host presents their own unique perspective on the moment between being awake and falling asleep. In the Radio Times it says: ''It's weird and it's wonderful, and this is the closest thing to Radio 4 dropping a hallucinogen into your cocoa.''
It certainly sounds worth a listen to me, here is the link:
BBC - Radio 4 - White Nights - Tamsin Greig
Radio 4 streams over the internet for those who do not get direct reception.
Cheers
Carl