What's with this wording from BA? Has anything changed or is this old news?
Changes to reward flight prices with British AirwaysWe have introduced variable Avios pricing for reward flights depending on the time of the year, the cabin and zone. At busy peak times of the year we have a standard Avios price and for less busy, off-peak times fewer Avios are needed. Two thirds of the year is off-peak, including every Tuesday and Wednesday.
Taxes, fees and carrier charges must still be paid in full and the cost of these will not vary depending on if you are travelling during a busy or quieter travel period.
To learn more about the new reward flight pricing and peak and off-peak travel dates, see Reward flights.