It's a bit of a long read, but the answer is likely to be in this thread.
http://www.hotukdeals.com/deals/thr...ly-plan-total-180-18pm-30-day-rolling-1593749
Thanks muon, don't know why HUKD didn't pop-up in my mind!
For those interested, there isn't much in the link, though it appears that there is a risk that TCB may be rejected - it seems that they still have not updated the plans. As you may know, Quidco recently introduced two different membership types - Premium costs £5 per year (comes out of cashback) while Basic is free. While Quidco will give you slightly lower cashback, right now it is the safer choice (and is worth the £2 or so for the decreased risk of failing).