Large crowds of protesters gathered outside Downing Street to protest against Boris Johnson's suspension of parliament.

The protest began with hundreds of protesters, but grew to several thousand, according to media reports.

While it is not unusual for a Prime Minister to prorogue parliament at certain times, the length and timing of the latest suspension -- not long before the UK is due to leave the EU -- is seen as an undemocratic 'coup' by protesters.

Hundreds gathered outside Downing Street in London on Saturday afternoon (August 31) to protest Prime Minister Boris Johnson's decision to prorogue Parliament.

Johnson's critics argue the decision is a coup, whilst his supporters have said it is a normal constitutional procedure.