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 jemma.carr@mailonline.co.uk or call 02036153649