Schools in and around Norwich are among 21 across Norfolk that have been told by Ofsted that they will be spared an inspection.

Last week, 11 of the county's schools received letters saying they would not be inspected until at least summer 2012 – or, in the case of two outstanding schools, only if 'further information raises concerns'.

Now another 11 schools rated 'good' at their previous inspection will be spared a visit until summer next year at the earliest. And 10 schools rated 'outstanding' last time will avoid a follow-up.

They include:

? Good: Corpusty Primary; Cromer Junior; St Peter's Primary, Easton; Saxlingham Nethergate Primary; Spooner Row Primary.

? Outstanding: Alderman Swindell Infant, Great Yarmouth; Browick Road Infant, Wymondham; Lingwood First and Nursery; Mousehold Infant and Nursery, Norwich; Stradbroke Primary, Gorleston; Trowse Primary.

Ofsted is able to examine from afar the paperwork and data of good and outstanding schools. If there are no signs of deterioration, it puts off a return visit - enabling it to concentrate on schools that are satisfactory or worse.

In the letters to the 'good' schools, Ofsted chief inspector Christine Gilbert said: 'I am pleased to inform you that our interim assessment shows that the school's performance has been sustained and that we can defer its next full inspection.

'As a result, the next inspection will not take place any earlier than the summer term 2012 unless we receive information in the course of the coming year that causes us to inspect earlier.'