I'm on BA1 and my spare pillow (from the empty seat next to me) has been tidied away (I suspect to add comfort to the hi-comfort jump seat for crew rest).

This leaves one - as quoted elsewhere - "much farted on" - tiny pillow

These must be the pillows which started with the babybus service many years ago, and should really be retired. It's more of a biscuit than somewhere comfy to rest ones head.