A warning has gone out to people in Bristol, Bath and Taunton around Kill the Bill protests planned for Saturday (May 1).
The demonstrations are against the UK government's Police, Crime, Sentencing and Courts Bill
It would be the 11th Kill the Bill protest for Bristol, with a Facebook event advertising food and stalls at College Green from 5pm on Saturday (May 1), before a "rally and march through the city" starting at 6pm.
So far, 76 people have marked themselves as 'interested' in going.
A statement from Avon and Somerset Constabulary said: "People living, working and planning to visit Bristol, Bath and Taunton should be aware of the potential for travel disruption and protest activity on Saturday 1 May.
"We’re aware that various groups are intending to march and/or demonstrate in the town and city centres from 11am on May Day.
"Officers remain committed to facilitating people’s democratic right to protest and are keen to help ensure these events take place safely.
"Under current coronavirus regulations, protest organisers must carry out a risk assessment and take all reasonable measures to limit the risk of transmission of the virus.
"Restrictions have eased in line with falling infection rates but the virus hasn’t gone away and NHS staff are still working hard. Those planning events are urged to get in touch with officers who can give advice.
"Trade unionists, who have arranged a march to mark International Workers’ Day, are the only group to have been in contact with officers so far and police welcome the opportunity to work with them.
"Avon and Somerset Police recognise the rights of protestors to express themselves, but have a duty to balance these rights with those of other members of the public.
"Plans are in place to monitor and engage with those involved, including having specialist liaison officers on the ground, so that we can mitigate the disruption by keeping our communities informed."
A 'Workers Solidarity Day' is set to start with demonstrators assembling at noon in Castle Park.
A notice says there will be a march round Broadmead at 12.15pm, before a 1pm rally at Castle Park. Its organiser is the Bristol Trades Union Council and Bristol Co-operative Party.
