Nottinghamshire Police have released this CCTV footage in an appeal for witnesses to a brutal robbery that happened in September, this year.
Christian Lecoutier was attacked from behind by two men. He suffered a fractured eye socket and skull before they stole his rucksack.
The CCTV shows two men, one in black and the other in white, walking behind Mr Lecoutier, shortly before the attack. Police want to speak to these two men in connection with the incident.