Originally Posted by
Globaliser
For the times when EF is returning false negatives for BA flights,
https://rewardflightfinder.com is an alternative (although its level of detail only goes down to days rather than specific flights). It's returning a positive for 1 June, which confirms that EF is returning false negatives at the moment for that day, given that ba.com is being very specific that there is availability on that evening flight.
Thanks. PS - I deleted the post as I didn't want to run afoul of the cross-posting rules.