As has been already said,TB(either bovine or avian)are both 'Notifiable diseases',and as such should be left where they drop or at least where they are gralloched,and a DEFRA VET should be contacted and they will come out to you.You should definitely never move the carcase though as it would cause contamination,so let the experts do their thing.Things to look out for are pussy lymph nodes in the lungs/throat and/or mesenteric region,and white nodules(maybe chalky)in the lungs.....
Here is a decent site with some pics..........
http://www.michigan.gov/emergingdiseases/0,1607,7-186-25804-