The cost of policing the march by the English Defence League and a counter-demonstration in Bristol last month was almost half a million pounds, according to new figures.
Avon and Somerset Police called in help from 23 other forces, using a total of 1,100 officers. 16 arrests were made.
Sixteen people are being questioned by police in Bristol following a day of marches in the city.
Around 300 supporters of the far-right group the EDL gathered in Queen Square to hear speeches complaining about what its leaders termed the 'Islamification' of the city.
The EDL activists then took part in a short march.
Approximately 500 people from the We Are Bristol campaign also marched through the city in protest at the EDL's presence.
A total of 16 arrests were made during the day for offences that included going equipped to damage, failing to remove a face covering and assaulting a police officer.
Sixteen protesters were arrested as two major demonstrations took place in Bristol city centreRead the full story ›
Kerry McCarthy, MP for Labour, Bristol East, says Bristol is multi-cultural and accepting of diversity, and most EDL supporters have come from other cities to stir up hatred.
We spoke to Weyman Bennett from Unite Against Fascism before their demonstration:
There have been angry scenes in Bristol today as the English Defence League marched through Bristol. Counter protest group We Are Bristol came within yards of the EDL rally, with a thousand officers on standby attempting to keep the two apart.
At one stage a bin was set on fire and missiles were thrown. Riot police have made at total of seven arrests, including one for racially aggravated behaviour.