Having had a good nose around, there are many destinations away from London/Reading whose current 'normal' advance fares are less than the promotional fares -= especially the longer distance ones into the Southwest & west Wales. Take care!
Indeed, or fares that are the same price they are normally!
It appears to be not easy to find these advance sale fares!
Anyone got any examples they can post of true advance sale fares you've found?
Yes - my day trip on 28th January, Melksham to Penzance, 2 x £12 singles, which are below "normal" advance fares on those timings, even taking into account the senior railcard discount that's not offered on sale tickets.
Now - BRFares suggest the following:
Which suggests to me that
GWR▸ sometimes do offer the £12 outside the sale, and indeed the railcard discount would them apply - so you might consider that this is not really a sale - that they may have taken the £12 at the time of year they would normally offer them anyway, labelled them as being a "sale" and then put the price up for old bogies like me by not giving us a loyalty discount, even though we have paid for that loyalty discount card.