Small White worm (?) in wet soil

Small White worm (?) in wet soil

Observation - Small White worm (?) in wet soil - UK and Ireland. Description: White worm found in decaying leaf vegetation next to stream. Moves by throughing its body about while balancing on head and tail and squirms.

White worm found in decaying leaf vegetation next to stream. Moves by throughing its body about while balancing on head and tail and squirms.