My goodness, the seat map really is chokka with only 11D, 12F, 13D, 13G, and 15G available. My sympathies.
Bassinet seats at row 15 may become available as soon as OLCI opens (provided they are not already assigned). Don’t forget though passengers who are connecting onto the UVF from other BA flights will be able to snag these coveted seats earlier than those starting their journey from London.