Two Turkish sailors convicted of smuggling a record £512m worth of cocaine aboard a tug boat are to appeal against their convictions.

Mumin Sahin and Emin Ozmen were jailed after three tonnes of the Class A drug were discovered inside the MV Hamal about 100 miles off the coast of Aberdeen in the North Sea.

The seizure in 2015 is said to be the biggest single cocaine haul recovered at sea in Europe.

The ship's captain Sahin, 47, was sentenced to 22 years, while second in command Ozmen, 51, was given a 20-year term at the High Court in Glasgow earlier this month.

Charges against four other men were found not proven.

A High Court official confirmed Sahin has intimated his intention to appeal against conviction and sentence, and Ozmen against his conviction.

The drugs were found hidden in a secret hold in the Tanzanian-registered tugboat, which was sailing from Istanbul in Turkey to Guyana in South America via Tenerife in the Canary Islands and the North Sea.

It was stopped by the Royal Navy frigate HMS Somerset and Border Force cutter HMC Valiant following a tip-off from French intelligence.

Investigators drilled through a steel plate into a secret compartment to find 128 bales of cocaine weighing 3.2 tonnes which took nearly three days to remove.

The entrance was found under a wardrobe with the opening cemented over - one of the most intricate concealments the Border Force has encountered.

Judge Lord Kinclaven told the men the quantity of drugs was "not only significant but massive" and drugs trafficking had a "devastating impact" on people and communities.