Today, we look at the return of Banksy after a new mural appeared overnight on a building in North London. And we look at why some potato-sized lumps on the seabed could be so valuable.

Plus, the dispute going on over precious metals found in deepest parts of the ocean. The lumps contain crucial battery minerals including copper and cobalt, but some environmental groups say attempts to collect the materials could damage unique habitats. Adam looks at what’s at stake with oceanographer and co-host of the Radio 4’s “Rare Earth” series, Dr Helen Czerski, and BBC climate editor Justin Rowlatt.

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