Sorry, I've no idea which SQ B772s are ERs and which B772s aren't ER. So, I have supplied the below list of the registrations of SQ B772 being used on the BNE routes on the first 9 days of May. For those who know more than me, please mention which one got Spacebed and which one don't.

May 1 - SRE, SRN, SRP
May 2 - SRF, SRM, SRN
May 3 - SRD, SRF, SRK
May 4 - SRB, SRK, SRM
May 5 - SRB, SRK, SRN
May 6 - SRH, SRN, SRQ
May 7 - SRI, SRL
May 8 - SRJ, SRL, SRQ
May 9 - SRK, SRM, SRQ