The appellant was employed as a home carer by the respondents. Her work involved visiting clients in their homes and providing personal care. On 18 December 2010, at around 8pm, she was required to visit an elderly lady. There had been severe wintry conditions in central Scotland for several weeks, with snow and ice lying on the ground. The appellant was driven to the house by a colleague, who parked her car close to a public footpath leading to the house. The footpath was on a slope, and was covered with fresh snow overlying ice. It had not been gritted or salted. The appellant was wearing flat boots with ridged soles. After taking a few steps, she slipped and fell, injuring her wrist.

The appellant won her original claim for damages but lost an appeal by the employer. The UK Supreme Court has now found in her favour and that in the circumstances, it was reasonable to infer that the failure to provide the anti-slip attachments caused or materially contributed to the accident on the pathway to the client's home.

The requirement to work set Mrs Kennedy apart from members of the public who venture out during icy conditions:

"Miss Kennedy was not, however, in the same position as an ordinary member of the public going about her own affairs. It was her duty, as someone employed by Cordia as a home carer, to visit clients in their homes in different parts of the city on a freezing winter’s evening despite the hazardous conditions underfoot. Unlike an ordinary member of the public, she could not choose to stay indoors and avoid the risk of slipping and falling on the snow and ice. Unlike an ordinary member of the public, she could not choose where or when she went. She could not keep to roads and pavements which had been cleared or treated. She could not decide to avoid the untreated footpath leading to Mrs Craig’s door. Unlike an ordinary member of the public, she was obliged to act in accordance with the instructions given to her by her employers: employers who were able, and indeed obliged under statute, to consider the risks to her safety while she was at work and the means by which those risks might be reduced. In those circumstances, to base one’s view of the common law on the premise that Miss Kennedy was in all relevant respects in the same position as an ordinary member of the public is a mistake."

http://www.bailii.org/uk/cases/UKSC/2016/6.html

As ever, the Supreme Court has a superb summary on video:
https://www.supremecourt.uk/watch/uksc-2014-0247/judgment.html