Equity rates exist to protect creative workers.
Daily Performance Salary must be at least the minimum wage hourly rate, (as defined in the National Minimum Wage Act 1998 or any modification or re-enactment thereof).
For example: from the 5th April 2021 Daily= £144 Weekly (5 days) £576 6th April 2021.
This with rise with inflation / minimum wage
See this leaflet from Equity with very useful advice for hiring workers, rehersals, meals and trade unions. :
https://www.equity.org.uk/media/3814/equity_shorts_festivals_leaflet.pdf