Just wanted to throw out another idea for those looking to keep their BA Avios account from expiring after 3 years. My 3-year expiry date was coming up shortly (not enough time to make a purchase on Gate 365 and wait for it to post to BA), so I was looking for a cheap/easy way to make a transaction. With only a few days left, I searched for Experiences in various cities trying to find the cheapest one available for Avios redemption (with no intention to actually use what I'd redeem for).

I found that admission to Linlithgow Palace in Edinburgh can be had for child, senior and adult for 550, 750 or 900 Avios, however when trying to book any one of these, a (false) message came up indicating I have insufficient Avios for this purchase and was not able to complete the transaction. It appears that any attempted redemption below 1000 Avios failed with this message. In the end, I successfully redeemed for a senior admission to the "Time Elevator Rome 3-D Movie and Simulated Ride" in Rome for 1100 Avios.

Anyone else in this situation may want to consider this option (The 3-D movie people will wonder how they got so popular!), or see if you have better luck with the Linlithgow Palace admission.