Rory Stewart said the existing Withdrawal Agreement was the only way out of the EU.
United Nations meeting looks set to be held in UK in 2020, after deal which will see events in the run up to the talks held in Italy.
Lord Tony Hall and Sir David Clementi have spoken about the Conservative government.
The sum paid for the 1938 piece of work quadrupled the price it made in 1996.
Downing Street said it had been ‘quite hard’ keeping up with anonymous quotes from friends of the Chancellor recently.
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