You must use a builder or scaffolding contractor who is trained and competent if you want to put up scaffolding.
It's the responsibility of the builder or scaffolding company to get a licence for any scaffolding they put up on the highway (this includes the pavement).
But it's your responsibility to check they have this legal document and that it doesn't run out before the building work is finished.
Visit GOV.UK for information on:
- finding a local approved scaffolding contractor