Just spotted this on the BA web site, and have spent the last 5 mins unsuccesfully searching to see if it has been raised before.
Originally Posted by ba.com
** For bookings made from 01 February 2011, customers travelling on a full-fare ticket in World Traveller (Y class) have a free allowance of 2 bags.
I wonder if this is to try and alleviate the situation with overhead bins being rather full in Y on busy flights, or BA just becoming more generous.
Source:
Free baggage allowance