Worth it if you want the strongest insurance and credibility position, plan to build a career rather than a sideline, or want licensing-proof credentials. Possibly not if you’re testing interest (start with foundation), are years from practice, or a provider is pressuring you to prepay the full fee. It is not legally required today, and anyone saying otherwise is selling.
Here is the balanced case. The Diploma buys externally verified competence evidence, preferential insurer treatment, recognition in the frameworks expected to shape licensing, and, less often discussed, the supervised repetition that actually makes you good. Against that sit £3,000–£14,000 and six to eighteen months of real work. Our advice is consistent: foundation first, then practise, then commit to Level 7 once aesthetics has earned a place in your career plan. The RPL fast-track exists precisely so experienced injectors don’t repeat their foundation years.