"When you go around research labs, or you talk to start-ups, they have really good sensors, and then you ask them how long they work. They say 'six months'. That's great for R&D... but in industry, I want this robot to work for 10 years," he says.
Most of the UK's mackerel fishing is based in Scotland, and the industry there has responded to Waitrose's move with dismay.
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