Last updated at 11:05

Nel and a team of helpers go mudlarking on the Thames

The mud under the banks of the river Thames holds many secrets.

So many secrets in fact that we packed Nel off with her wellies to find out what is buried beneath the sand and stones.

People have been mudlarking for centuries, seeing what they could find and sell it on.

So check out this clip to see how Nel and her army of fellow mudlarkers got on!