I've read that last piece too: as the White Cliffs of Dover sit outside the Port, they're not for sale. That was Act 1.
Apart from that, I am wondering IF DHB will make another submission. If they don't, the DPPT will dry out and fade away.
It seems Charlie knows this, and has finally lost patience, hence his discussion above. If he makes it to the next G.E. (whenever that be) and DHB are holding out, what then?
Finally, Mr. Penning took great care to praise the Bishop of Dover, who is on the opposite side to DPPT
