If 737 has reached a definitive conclusion I would have expected an announcement whether good or bad by now. I expect that an extension will be requested and honoured with an rns confirming this on the date of the agm or on last day of trading prior to Xmas.
Seems to HL not allowing to sell as just checked my other account with Halifax and they will take £20k off me at 26.35. I just managed to buy £10k at 27.05.