Seaweed is increasingly being recognized as a critical, and sustainable, resource for the UK’s bioeconomy. It is already positively impacting a wide range of industries, from plastics to pharmaceuticals, and contributing towards achieving Net Zero by reducing reliance on fossil resources. However, there are several challenges that prevent the UK seaweed industry from delivering its full potential. This brief summarises these challenges and opportunities for the sector, and was informed by a series of stakeholder interviews and a literature review.