Moderator: British Airways Executive Club, Marriott Bonvoy
Join Date: May 2006
Location: Englandshire
Programs: SPG LT Plat, BA G, BD*LG, MG Blue+ ...
Posts: 15,958
In this particular instance the OP has a reservation using the January "50% off points" promotion.
I have a similar reservation using this promotion and when I called up to try and reduce the stay from 7 nights down to 6, I was told that this would require the the whole stay to be cancelled and rebooked at current redemption rates, but also that that terms of the promotion stated that if I cancelled, all the points would be forfeited.