The Cessna light aircraft that ditched in the sea off Jersey was due to fly back to Perranporth on Wednesday afternoon.
A search and rescue operation is underway to find what is believed to be two people onboard.
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A teenager has admitted carrying out cyber attacks on websites across the world including Devon and Cornwall Police and Seaworld.
John Norris from Plympton was killed whilst out cycling in Stoke Fleming in June.
The Devon MP said her party needed "a credible leader with statesmanship, negotiating skills & an eye for detail".