Very tempting offer, with this board being as balanced as poised for turning in either direction as it is, and the potentially powerful twists the Banker still has at his disposal to my empty arsenol. However... Even with that being the case, I think there's another round here, so... No Deal.

21, 19, 17.

At this point you could normally use a twist after each box but you're out of twists and the Banker doesn't see any point throwing one of his into the ring before seeing a full round, so here goes...

21 - 1p! What a game-changer that is!
19 - £250,000! Not the game-changer it normally is, it's the backup!
17 - £1!

Banker chooses to keep his twist intact, so onto the shift...

We are shifting... chicken fillets! That's great, but this could turn negative...

...£22,000!

The Banker can't believe it, but he's keeping his powder dry with the twist as he wants to see the 5-box configuration, and he wants to maximise the uncertainty because he thinks that will make sure you do not risk anything as big as this...

10p
Nákd bars
£1,111
£2,000
£22,000
£35,000
£100,000
£700,000

BANKER'S OFFER

£56,000

I think I'm going to need to take that. And I suspect I'd have took that without the Banker having a twist, as well. While the £100k is a healthy backup, this is essentially a one box game at this point.

Thankyou very much, Mr Banker. Deal.

15, 13, 11
9, 7, 5

And kept 3 out of the final two would have been my proveout options.

9 is yours, but let's start with these three...

15 - £22,000, the ex-blue eaten up.
13 - £700,000! What an escape!
11 - 10p, but that would have been a mere crumb of comfort...

The Banker would have expected you to chase the money if still in play, so Guaranteed Downshift would have been the call.

£2,000 would have turned into £800 as a result...

Nákd bars
£800
£1,111
£35,000
£100,000

BANKER'S OFFER WOULD'VE BEEN

£16,500

Presuming 7, 5, and... 3?

7 5 and 1, leaving a 9/3 finish.

7 - £100,000! Boom, shake the room, it's an OPW barring the Seventh Shift!
5 - Nákd bars, so the Seventh Shift is definitely available...
1 - £35,000!

It's a given you'd have gone Seventh Shift on an £800/£1,100 finish...

£1,100 becomes £222,000!!

£800
£222,000

BANKER'S OFFER

UNDEAL

...Ugh.

...I'll No Deal the Undeal and keep my £56k safe.

9... contained...

£222,000!

Well, that's one way for the Banker to seize a victory at the end. 3 contained the £800.

It's relief for the Banker, but £56,000 of his money for you, and both sides can look back on a classic game!