Deesh was at the local department store's

summer sale. He saw a jacket that he wanted to buy but he couldn't reach it because another shopper, Brian,

was in front of him. Deesh elbowed Brian out of the way, but Brian slipped on the shiny floor and fell into a

display case. The case shattered and Brian received a severe cut to his face.Deesh tried to flee, but two men

who had seen what had happened ran after him. Deesh ran into the sports department and picked up a golf

club, he waved it at the two men and advanced on them. One of the men, Jonathan, ran away but the other,

Tony, stood his ground. Deesh hit Tony with the club breaking his jaw. Deesh was arrested shortly afterwards.

D charge under s.20 of Offence Against the Person Act 1861

can D use selfdefense as his defence? if so how to prove that was self defence