The jury at Lewis Crown court heard how Lauren Bishop, Michael Clark and Edward Phillips, met up after and celebrated by buying and drinking alcohol on the seafront.
CCTV from the Londis store nearby showed Phillips and Clarke laughing and joking shortly after carrying what the court heard was a brutal, vicious and horrific attack.
More top news
69 year-old Peter Sutcliffe has been photographed in The Sun on Sunday on a visit to Frimley Park Hospital in Surrey.
Forty six badgers in Sussex have now been vaccinated against bovine tuberculosis.
Proposal would see a task force set up to assess environmental impact from breaches of emissions testing rules.