Well, ex CPT into the UK is very different.
We (the mrs and I) need to get to LGW (or LHR) mid January. Last week, there were still J saver fares available, now I only see Flex. That's an extra ZAR20000 for the two of us.
The mrs is definitely going to pressure me to fly Y (and spend the difference on 'something nice').

I'll wait a bit, but am not too hopeful that Saver fares will suddenly come back....