It seems like your sentence was cut off, but I can provide some general ideas about potential goals or predictions for Britain and other nations within the next 15 years based on common discussions around global progress and development:

1. **Sustainable Development**: Nations could achieve significant advancements in sustainable energy and infrastructure, reducing carbon footprints and combating climate change.

2. **Digital Transformation**: There could be widespread adoption of digital technologies, improving efficiency in government services, healthcare, and education.

3. **Healthcare Improvements**: Significant strides could be made in medical research, leading to better treatments and potentially even cures for major diseases.

4. **Global Cooperation**: Enhanced international collaboration on issues such as climate change, public health, and economic stability could lead to more effective global governance.

5. **Education Reform**: Educational systems might adopt new models that incorporate technology and focus more on critical thinking and creativity.

If you had a specific area or outcome in mind, please feel free to provide more details so I can give a more tailored response!