Thanks Kathryn.
No, I didn't do Netflights. With the dummy bookings I tried last night with various dates (still have to wait a week for CO flights to be released for my dates) once I put the flights into my cart, the price jumped by over £100 each time.

CO was cheaper. I couldn't find out what timezone they work on so I checked at midnight, 1 am and set my alarm for 5 to every hour until 5 am when my dates opened up. I wasn't kidding when I said once I set my mind on something, that's it!

97 p credit available on the credit card though and it happens to be the day before the next statement cut off so it will be due at the end of the month

well done Lee I knew when you had booked your accomodation the flights would soon be booked as I think doing a DIY you were a bit worried.
I am so pleased about it though. I knew the route, times and price I wanted and it's about knowing yourself. I would not have been relaxed sitting it out and hoping for a good sale in the months to come.