Rotularia bognoriensis (Mantell, 1822)

Rotularia bognoriensis is one of the species of worm which can be found in the London Clay. An example of the burrows Rotularia bognoriensis leaves behind can be seen below. 

References:

https://www.gbif.org/occurrence/1056378567 

https://www.gbif.org/species/11598529