As annoying as the IT systems are with an incoming DUB-LHR on EI stopping on-line check-in when it becomes available, i'm trying to pay to reserve a seat on the A388 for LHR-LAX.
I bring up the seatmap and there are 0 seats available to pay to reserve on the lower deck and about 7 available for the upperdeck.
When my friends on a different booking log-in (group of 5), they can see many seats to reserve on the lower deck and a few extra on the upper deck.
We all want to pay for 6 seats together and right now I can't even pay BA to sit with my group of 5

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Can you book seats over the phone or will that incur even more charges?