THIS image shows what the prosecution say is an "aborted acid attack" at a Worcester school, days before an acid attack on a three-year-old child.

The prosecution said at the trial at Worcester Crown Court earlier today that Norbert Pulko, pictured, was one of a gang of three staking out the primary school on July 13 last year, eight days before the acid attack.

Pulko, of Sutherland Road, London, denies conspiracy to apply a corrosive fluid with intent to burn, maim, disfigure or disable the boy or cause him grievous bodily harm following the alleged attack on Saturday, July 21 last year.

The still image of the 22-year-old is taken from the CCTV shown to the jury earlier, which has been released by West Mercia Police.

The trial continues.

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