Yes, you do have to be very quick and have your finger on the pulse. I think they are running this current campaign until the end of March.When refurb items come in they only come in one or two at a time. So when an item is a good price it does not last long.
It was the 65AG8 for £1249. The 65AF9 would never go that low unfortunately.
The website refurb portal is updated weekly for new stock on Thursdays, Fridays and Saturday. After that point you have to wait until the following week. So keep your eyes peeled from Thursdays.
Always worth having a good relationship with a Sony store manager to give you a heads up but in reality once the refurb stock goes live it's first come first served. As you already know they sell out in a very short space of time.