Hello fellow flyers, does anyone know how often BA open up Avios redemptions for F? I know CW is guaranteed 2 per day and F isn’t guaranteed but when F does show up is there a method to the madness? I.e does F get released at midnight or can it be sparadoic throughout the day? Just need any idea based on peoples previous experiences.

For some context I’m looking for F from LHR to LAS for the 17th sept. I currently have it booked in J