You test this by sliding a piece of paper between the two -- if it can't slide in, they're too close.

ENGADGET: MakerBot Replicator impressions: the dawning of 3D printers in every home?

The concerns centre on a section of the English test, where pupils are asked to produce a piece of creative writing - an area which has attracted complaints in recent years.

BBC: Head teachers complain of 'erratic' Sats marking