A man who punched a teenage girl and a female student, leaving them unconscious on the ground, has been jailed for four years.

Michael Ayoade, 35, was caught on CCTV staging the random attacks in Plaistow, east London.

In the second attack on November 13 last year, he jogged up behind a 16-year-old girl in the High Street and punched her in the head. The teenager fell to the ground, breaking three of her teeth.

A year earlier, Ayoade punched a university student in the side of the head at Plaistow tube station. His victim, Daniella Montieth, was taken to hospital with a broken tooth.

Passing sentence at Inner London Crown Court, Judge Roger Chapple said Ayoade, of Greengate Street, Plaistow, had launched "vicious, unprovoked attacks on young, lone females".

He said: "These images are indeed worth many thousands of words. The footage captures graphically the shocking violence of these attacks.

"In both cases there was but one blow. In the case of (the 16-year-old) it can plainly be seen from the CCTV footage that the force behind the blow was massive.

"The ferocity of the blow that you struck to her after running up behind her with full force was truly shocking.

"In both cases the force of the blow was such as to render the victims unconscious albeit mercifully not for long."

Ayoade, who is originally from Nigeria, followed the teenager for 800m before attacking her.

Prosecutor Joel Smith told the court Ayoade said she had "looked at him in a rude way" and that he could not go through the rest of the day having taken "an insult from a little person like that".

Ayoade, who was arrested shortly after the attack, admitted two counts of assault causing actual bodily harm and one of possessing cannabis after a bag of the drug was found at his home.

Defending, Gillian Frost said Ayoade, who had smoked three or four cannabis joints and drunk a cup of vodka before attacking the teenager, had not wanted to cause more serious harm to either woman.

He was jailed for four years for the attack on the teenager and 19 months for punching the student, although the two sentences will run concurrently.

There was no separate penalty for the cannabis charge.