The summary Sats results given to each primary school have been temporarily taken down from a government website after a reported error.

Schools were plunged into confusion this morning when they were given summary Sats results that did not match individual pupils results.

The results were published on the NCA (National Curriculum Assessment) Tools site.

It appeared that pupils who were working below the level of the tests had not been included in the calculations – giving a higher overall score than expected.

Now the results have been removed.

Data expert James Pembroke described the situation as "chaos".

And this morning's data release has not impressed those at the sharp end.

The action this morning came after a previous blunder in which some heads were able to access their results early on Friday.

Headteachers were able to access their results from 7.30am today, the national results were published at 9.30am.

The national results revealed that 64 per cent of Year 6 pupils reached the expected standard in reading, writing and maths this year, up from 61 per cent last year.

Updated at 9.20am on 11 July 2018:

A Department for Education spokesperson said: “Due to an error with a calculation in the NCA tools system – which tells schools what proportion of their pupils achieved the expected standard at key stage 2 - this section of data was temporarily removed from the system and an updated version has now been reposted. This has had no effect on the published national Key Stage 2 results or individual pupils’ results.”