Rare prehistoric pools known as “ghost pingos” have been brought back to life by a project aiming to recreate nature-rich Ice Age landscapes in the Brecks.

Pingos are shallow ponds formed in post-glacial depressions which harbour a unique wealth of wildlife - but over the centuries many were lost after fields were filled in for agricultural use.

The Norfolk Wildlife Trust (NWT) reserve at Thompson Common, between Watton and Thetford, has around 400 pingos, but hundreds more are believed to be buried on the surrounding land.