Lukasz tried to pin knifeman Usman Khan, 28, down using the tusk as the attacker stabbed his hand
One man and one woman were killed in yesterday's attack near to Bank Station, and three others were injured.
Comes after tour guide Thomas Gray, 24, was revealed as one of the heroes who helped to disarm the attacker
Do you know Lukasz? If so, email email@example.com or call 02036153649