An old-fashioned way of prepping businesses for cyber attacks. Live from the UK, this is the Marketplace Morning Report from the BBC World Service. I'm William Lee Adams. Good morning. We start with the latest advice on how to battle cyber attacks, and it might be more low-tech than you think.

CEOs have been urged to plan for computer security breaches by going back to pin and paper.

The UK government has told chief executives to plan offline contingencies after a number of high-profile attacks on companies,

hacks that cost global brands millions of dollars.

It comes as the UK's National Cyber Security Center reports an increase

in nationally significant breaches this year. The BBC's cyber correspondent is Joe Tidy.

It's the third year in a road that the National Cyber Security Center has dealt with record

numbers of serious cyber attacks on UK organizations. Some have been very public. Others have been kept secret.

200 were classed as nationally significant, 18 of them, in the second highest category.

The centre pointed to shop shelves being left bare after the wave of hacks on UK retailers,

as well as factory floors being abandoned at Jaguar Land Rover. The threat from Russia and China has grown,

but criminal ransomware and data breach extortion attacks

remain the biggest threat to organisations.

The agency, along with the government,

has written to hundreds of businesses,

warning them to strengthen their defences.

In particular, they've been told to plan for how to keep going

using pen and paper if hackers take computers offline.

Joe tidy there. Delegates from more than 100 countries are in London for UN talks aimed at reducing the environmental impact of global shipping. Nations had been expected to adopt an international plan to move to cleaner fuels,

but a last-minute intervention by the US administration has cast doubt on the deal.

Here's the BBC's Esme Stalard.

It took 10 years of negotiations before finally in April,

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