Its seems to have quite a lot of room
LHR London Heathrow UK [EGLL]
PEK Beijing Capital Intl CN [ZBAA]
MON 01 Sep 2014
Carrier Flight From Depart To Arrive A/C St Availability
--------- ------ ---- -------- ---- -------- --- -- -----------------------------------------------------------------
BA 39 LHR 16:45 PEK 09:30 +1 744 F7 A6 J9 C9 D9 R9 I9 W9 E9 T9 Y9 B9 H9 K9 M9 L9 V9 S9 N9 Q9 O9 G9
As for seating I cant really comment, but when I flew to SIN, in a simlar position to yours, the agen blocked the seats next to me, which really helped me out. I suspect it depends on status?