Victimisation of the Tolpuddle Martyrs inspired widespread outcry in Britain. Trade unionists and supporters recognised this as an attack on the rights of workers to organise for better conditions and influence in society at large.
The Grand National Consolidated Trades Union called a meeting - attended by more than 10,000 - on 24 March 1834. On 21 April Copenhagen Fields in London was flooded with up to 100,000 trade unionists; they marched to Parliament and delivered a petition signed by 250,000 people.
In response to public outrage, a conditional pardon was granted by June 1835. Pressure mounted as petitions from all over the country were delivered to Parliament. Full and free pardons were granted in March 1836.