Asking on behalf of a friend travelling through Nairobi, with a long wait in transit. Seen older posts on this, but checking for more recent knowledge. On the outward journey, she said she was told that she needed a "voucher" to use sleep room facilities. Cannot find any reference to this; Kenya Air do not answer the phone at Heathrow, nor do they reply to emails at Nairobi Airport! There are rest rooms, as previously described on this site; are they turn up and pay?