The fight to stop a huge waste incinerator ever being built in North Yorkshire will move to the High Court today.
Opponents say the plant outside Knaresborough would be a blot on the landscape.
Supporters say it is a cost effective way of dealing with the county's waste.
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His Royal Highness rounded off his visit to the region by giving a speech at Virgin Money headquarters in Newcastle.
Sunshine and showers tomorrow - but it is the calm before the storm.
Prince Harry joined Steve Cram and Jonathan Edwards in training those taking part in the London Marathon for charity Heads Together.