Police are appealing for witnesses to a robbery that occurred on the upper promenade, Kings Road, Brighton, opposite the Metropole Hotel, on Christmas Day.
The victim, a local man in his 30s, was walking home having celebrated Christmas with his family when the robbery took place between 10pm and 10.30pm.
He sustained significant head and facial injuries that required hospital treatment, and had his mobile phone and some cash stolen.
Three people are suspected of carrying out the robbery.
The first is described as a white man, aged 35 - 45, around 6' and of medium build. He was unshaven with dark hair. He was wearing dark 'winter' clothing. He was also described as having an eastern European accent.
The second suspect is described as a white man, aged 35 - 45, more than 6' tall and of stocky build.
The third suspect is described as a white woman, about 5'6", and with shoulder-length dark hair.