Hi,
A Halti or something similar might be a good iea to stop the pulling or stop and change direction very quickly,as for been off lead and his recall not been good,he is a ESS an his hunting working instinct is coming through.
Have you thought about a long training line just until he is reliable off lead.
In all honesty he really shouldn't be off lead with unreliable recall,but he is probably doing what he was bred for.

With the biting you need to teach bite inhibition,there is a link on here somewhere,I'll have a look to see if I can find it.If he has something he is not supposed to have try and replace it with something of his,or take it an reward with praise an a treat.

*Going to look for the bite inhibition link*