Great Britain's 70 ft state-of-the-art yacht has gone on display in Trafalgar Square ahead of it's voyage around the world. It's due to take part in the Clipper Round the World Yacht Race at the beginning of September.
More top news
A post-mortem report found no traces of drugs or alcohol, and the evidence suggests Simon Brown was not taking photos.
The masked men used an angle grinder to tear through the lock.
Doing as little as possible in the first minute helps people regain control of breathing and increases chances of survival, says the RNLI.