Join Date: Oct 2006
Location: London, UK
Programs: BA Gold, VS Silver, SQ Silver, IHG Plat Amb, Hilton Gold, Marriott Plat, Accor Silver, Radisson Prem
Posts: 16,871
Where the two sectors separate bookings? If so, BA are under no obligation to do anything in these circumstances.
If it was the same booking, BA should have rebooked you onto the next available flight in the same class at no cost.