Unless your constitution requires it you do not have to have an independent examination (or audit) if your income is below £25,000.
Even then the Independent Examiner does not have to be a qualified accountant unless your income exceeds £250,000. Audits are only required when your income exceeds £500,000.
You just need to find someone who the trustees believe is sufficiently competent to look over the accounting records (to confirm records have been maintained) and to check the accounts (Receipts and Payments) agree to these records. They should follow the Charity Commission guidance for Independent Examiners which is available on the CC website.