BBC Crimewatch - Appeals: Joanna Yeates murder

Landscape architect Joanna Yeates was last seen alive and well on the evening of Friday 17th December, 2010. On Christmas Day, her snow-covered body was discovered, eight days after she had disappeared from her flat in Clifton, Bristol. She had been strangled and dumped on a roadside verge, three miles from where she lived. Joanna finished work at 6pm and headed to the Bristol Ram pub on Park Street with colleagues. She left at around 8pm and ten minutes later, is seen on CCTV going into the Waitrose supermarket on the Clifton Triangle. She left, empty-handed, a few minutes later and continued up Richmond Hill before turning left on to Queen's Road.

At 8.13pm, Joanna called her best friend, Rebecca Scott, to arrange meeting up on Christmas Eve. She sounded happy and was excited about the holidays. This is the last phone call we know Joanna made.

She is next seen on CCTV at 8.24pm in Bargain Booze on Regent Street, Clifton. She bought two 600ml bottles cider and then walked up the road to Tesco. CCTV shows her using the self checkout to buy a Tesco Finest Mozzarella, tomato and Basil Pesto pizza at 8.28pm. This is the last time we know for certain that Joanna was alive and well. It is only a short distance to her flat on Canynge Road, Clifton, from there.

Joanna lived with her boyfriend, Greg Reardon. The last time he saw or spoke to Joanna was on Friday afternoon. He then spent the weekend in Sheffield.

When he returned home at around 8pm on Sunday 19th, he discovered the flat was empty. He tried calling Joanna, only to discover her mobile in her coat pocket. Her purse and keys were also all inside as were the coat and boots she usually wore. Detectives also found receipts for the shopping she'd bought that night along with the bottles of cider. The only things missing were Joanna and any trace of the pizza she had bought.

After ringing around friends and family, he realised no-one had seen or heard from Joanna since Friday evening and he reported her missing to the police.

A week later, on Christmas Day, Joanna's body was found by a couple walking their dog on Longwood Lane on the outskirts of Bristol. The heavy snowfall that week meant her body was hardly visible and that she had lain there for several days. She wasn't wearing a coat or shoes and one of her socks was missing.

Click here to view photos provided by the police and Joanna's family.