You could do a degree or postgraduate qualification in footwear design, or a fashion design qualification that includes footwear.
You should look for courses that teach both the design and technical skills needed by the industry.
The British Fashion Council is a good place to start looking for courses.
You'll usually need:
- a foundation studies diploma in art and design
- 2 to 3 A levels for a degree
- a degree in a relevant subject for postgraduate study