1. Visual Impairment Centre for Teaching and Research, School of Education, University of Birmingham, Birmingham, B15 2TT, United Kingdom
2. Visual Impairment Centre for Teaching and Research, School of Education, University of Birmingham, United Kingdom
3. Visual Impairment Centre for Teaching and Research, School of Education, University of Birmingham, United Kingdom.
4. RNIB Centre for Accessible Information, 58–72 John Bright Street, Birmingham, B1 1BN, United Kingdom
5. Pillbox Design Ltd., 9 Coales Gardens, Market Harborough, Leicestershire, LE16 7NY, United Kingdom