Haulage yards, builders' merchants unloading by crane, and any site running planned lifts.

Endorsement A - all types, all duties
Theory and practical assessment, carried out on the employer's own machine, on their site.
No UK government body issues a licence for the role of slinger and signaller, and no statute requires one.
The duty to train and assess competence sits with the employer, under the Health and Safety at Work etc. Act 1974 section 2(2)(c) and PUWER 1998 regulation 9.
LOLER 1998 applies: regulation 8 requires every lifting operation to be properly planned by a competent person, appropriately supervised and carried out safely, and the Approved Code of Practice L113 requires lifting accessories to be selected for the load and inspected before use.
The slinger and signaller does not operate the machine; the role is planning the lift, checking the load and its accessories, and the signal system agreed with the operator before the lift begins.
The employer still authorises each operator in writing under PUWER 1998 regulation 9; the certificate, unit credit, records and site evidence statement are the evidence the employer relies on for that decision, not a substitute for it.