Peapod Junior Kids' Insoles, Recommended by physio for my son, used twice as are rigid and my son has a wide heel and didn’t get on with them.

Peapod Junior Kids' Insoles are suitable for a range of conditions including metatarsalgia, arch pain, knee pain, shin splints, tendon pain, back pain and postural related symptoms. Peapod Junior Kids' Insoles have a 1.5mm thermoplastic base which makes the Peapod Junior Kids' Insoles extremely space saving.
Peapod Junior Kids' Insoles are also heat mouldable and grindable to suit. RRP £14.99

Junior Kids' Insoles Adult size 1.5 (East Oxford OX4 1XR)