Flying BRU-LHR-IAH. Checked in online w/ SN for BRU-LHR and it did not give me my boarding pass for the LHR-IAH segment. Since I've got to change terminals, I'd like my BP prior to arriving at LHR to speed up my connection.

Can the SN (or UA?) staff at BRU issue a CO BP if I re-checkin there? Anyone have direct experience with that?

Alternately it'd be great if I could get co.com to let me check in for the 2nd segment on my reservation but it refuses since my first segment is non-CO.