>Our investigation has uncovered that GDL, owned and run by Jameel Malik, are routinely paid around £200 a day - tens of thousands of pounds a year - to drive lone pupils just a few miles to school.
>Included among the dozens of huge charges is a £230, three days a week charge, to drive a single child less than two miles each way to school in a wheelchair-accessible cab, around £65 per mile. A Hackney Carriage fare would be less than £15 a day.
>Another example is a £210 a day, or £40,500 a year, fare to drive one pupil a little more than three miles each way.
>The firm also charged £120 a day, nearly £23,000 a year, for a daily journey of just 1.5 miles each way for one pupil in a standard car.
>The boss of rival cab firm HATS, which has similar contracts with the Labour-run authority, was more than surprised by figures which suggest GDL charge around £11million more per year than their competitors for a comparable service.
>Allegations from a whistleblower that staff may have 'knowingly enabled or allowed overcharges to occur' spurred the more than £3billion-a-year authority to launch an internal investigation.
Hush money