Teaching unions say primary tests are unreliable

Teaching unions have said baseline assessment tests of four and five-year-olds in England are "unreliable" and "unfair".

Pre-primary assessments have been piloted at some schools in England, with a further rollout planned in September.

Two teaching unions have said it is damaging for pupils, while ministers argue there has to be a baseline from which to measure progress.

Our education editor Branwen Jeffrey reports.