Can agency workers be furloughed?

Yes, if they are paid via PAYE. This includes agency workers engaged under umbrella companies.

The furlough should be agreed between the agency (the employer) and the worker and documented in accordance with the guidance. It is recommended that the decision to furlough is discussed with end user clients. Just like other employees, agency workers cannot perform work through or on behalf of the agency while furloughed. This includes work for the client.

For agency staff working under umbrella companies, it is for the umbrella company and the agency worker to agree on furloughing the worker.