We are not sure of our timeline thats why I wasn't more specific. We are just looking to try something new for a while but i obviously do not want to jeopardise my status. A rough guideline could be a minimum of 6 months and a maximum of 1 year.
I know that if i am going to be travelling outside of the U.S. for more than 1 year then I need to apply for a re-entry permit before I leave, my question however referred specifically to whether i could file Form I-751 from England or whether I need to be back in the U.S.?