If you have concerns that your child may be dyslexic, it is best to speak to the school's Special Educational Needs Co-ordinator (SENCO) to discuss your worries. You can ask them to conduct a 'screening assessment'. A screening assessment will check if your child has traits associated with dyslexia. It may be advisable to request their SEN policy for further information on their assessment process.
If a screening assessment does indicate dyslexia, the school should put support in place to help. You should be involved in this process at every step of the way. All schools - including academies - must abide by the SEND Code of Practice.
If your child's school has serious concerns about your child having dyslexia, they may then request an assessment and/ or relevant support from an appropriate professional, which they should pay for from school funds. However you can also pay privately for an assessment from a fully qualified Educational Psychologist or Specialist Dyslexia Teacher who is AMBDA accredited.
You can contact the British Psychological Society (BPS) for a public directory of Chartered Psychologists and the Health & Care Professionals Council (HCPC) have a similar list available.