Poss sawfly larva on willow

Poss sawfly larva on willow

Observation - Poss sawfly larva on willow. Description: This the only photo I got as it subsequently fell off its twig into long grass. Realise it may not be possible to id from a photo but thanks for any help.

This the only photo I got as it subsequently fell off its twig into long grass. Realise it may not be possible to id from a photo but thanks for any help.