The Medicines and Healthcare products Regulatory Agency (MHRA) and the National Institute for Health and Care Excellence (NICE) have jointly delivered the Integrated Scientific Advice (ISA) service, which provides pharmaceutical companies with coordinated regulatory and health technology assessment (HTA) advice through a single application process, meeting and integrated report. Intended primarily for medicines in clinical development aligned to MHRA and NICE pathway timelines, the service replaces the previous joint advice model and aims to support earlier patient access by clarifying evidence requirements for market authorisation and HTA at an early stage, including advice on pivotal study design, real-world evidence generation and strategic planning, although it does not cover medical devices. Applicants must confirm eligibility, submit a request form, agree a contract and fee, and provide a briefing book and presentation before attending an advice meeting, after which a single report is issued within 80 working days of acceptance, subject to complete and timely submissions; limited factual clarifications may be requested. A single fee, payable in two instalments, covers the service, with a waiver available for the MHRA component for eligible UK-based SMEs, and the advice provided is not legally binding and reflects the information and regulatory context at the time.