Have a snake stuck in a bit of chicken wire. I believe it is a Western Whip Snake http://www.planetepassion.eu/snakes-in-france/western-whip-snake-france.html and not particularly dangerous although it is very angry. I have left it up the top of the garden hoping it will free itself by going backwards (can they do this?) as it just gets more jammed going forward. Unfortunately it seems to be getting nowhere although maybe once it has calmed down it might. Any ideas?