Ministers have launched a consultation into the nursery school free milk scheme, claiming abuse of the system means the Government is being billed up to £1 a pint.
Figures show that middlemen are charging around double the retail cost, meaning the Government is spending 92p on a pint of milk while most consumers can buy a pint for 45p.
A loophole in the system means the Government is obliged to pick up the bill, regardless of cost, submitted by firms that are acting as schools' go-between with suppliers.
Last year, it was estimated that the difference in price costs taxpayers an extra £10 million a year.
More top news
The memorial service will be attended by Prince Harry and Meghan Markle.
David Browning admits manslaughter by diminished responsibility but denies murder.
Four people have died and the suspect is still at large, police said.