Looking at the 108 games broadcast so far, 18 players have no-dealt right to the end and taken the value of the final box (whether it was their original one or a swap). Most of them have been moderate reds or very low amounts.

I was surprised to find that none of the top five amounts have yet been won by opening the box. The biggest win by no-dealing to the end was £20,000 by Vanessa in game 80 (2nd Feb).

Along with the power five, nobody has yet won 50p, £50, £100, £500, £750 or £1,000 by going all the way. So half the possible prizes on the board remain unclaimed!

And Saj takes the biggest win so far by playing on right to the end and opening the box. It's taken 116 shows for someone to claim one of the big prizes this way.

(Fairly vague) spoiler:
According to other posts I've seen, there won't be nearly such a long wait until the next time...