Ever so slightly off topic, but, regarding the effect of fuel surcharge on Avios redemptions, it is worth checking out the article – BA scraps fuel surcharges on short-haul flights – change your Avios redemption strategy – on the unmissable and ever informative Head For Points blog.
(FYI, I have no affiliation with H4P. I just love the really useful tips for collecting vastly larger numbers of Avios than I would ever earn by actually flying under the new BAEC terms. For example – It’s back – earn 3,600 Avios points with £60 Tesco grocery spend. Though hurry with that particular one, as it expires tonight!)