James1978 wrote:
Actually looking back at the offers, she turned down 55k when the mean was only 60k, and given the fact that 35k was enough to take her out on 100k/5k, she gambled on only a 1 in 3 chance of an 87k offer - and a 2 in 3 chance of it falling signifcantly (I reckon 75k/5k would have been mid-high 20s), so i don't think that was statistically a good decision. Dramatic though!

I'm not sure I agree with that. Turning down the £55k was entirely justifiable on statistical grounds -- what your analysis ignores is the fact that at the time of that offer there was a 2 in 3 chance of there being more than £55k in her box. That's a heck of a good statistical reason to turn the offer down!
The things that would have been going through my head at that stage -- if I were still in live play -- would be whether I'd be happy to win 'only' £5k after having been offered £55k. If so, then it's a clear No Deal. If not though, would the potential two-box offer on a £100k/£5k or £75k/£5k final two be a large enough consolation prize? In other words, if I went for the Lance final two but didn't get it, would I be happy to bail out at two-box with a (lesser) amount of money that I'd still be satisfied with? If yes, then No Deal the £55k and hope for the £100k/£75k final two. If no, then take the £55k and run.