All righty, Magic.gov.uk gives us the scores on the doors.
The ‘oval longbarrow’ is only half visible, the other half being under the road. It was measured at 46m x 27.5m in 1938 and oriented North-South. The other longbarrow measures 66mx21m, is oriented NNE-SSW and was placed on top of an oblong enclosure.
These two longbarrows are 2 out of only 5 visible LBs in Norfolk and hence fairly important.
They part of an extended cemetary nearby with a whopper at TF815249 on private land, 4 barrows clustered about TF833255 and Harpley barrow cemetary not too far away.
One more little titbit, these lie very near the Peddars Way, gateway to wessex...