Just keep checking every day, try and look at July to watch for a pattern. I booked three PE flights this time last year, then on 30/11 I was able to change them to UC. I just kept my eye on the pattern load, you could see them loading new dates nearly every day. Check early in the morning. I remember booking my UC ones at 6.30 am.

I never saw any return ones though, flying home the weekend folding the bank holiday.

Around two weeks before departure there were lots of dates in various cabins both inbound and outbound, but not the 30/08/14. I booked my return with BA.