This group of barrows is notable for two things. Firstly it contains probably the largest barrow still standing in Norfolk at 60 metres by 4.5 metres (be impressed!). Also as Rhiannon mentions, it has Wessex culture connections. A barrow now destroyed had a crouched skeleton buried with a grooved bronze dagger & gold sewed to his clothing. All of which shows Wessex culture had reached this far by 1700bce.
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(later) Reading the excellent Seahenge by Francis Pryor, he makes the point that the goods from this barrow were superficially Wessex, but on closer examination they were inferior in standard. Hence this area were Wessex wannabes (as it were...).