Slight rattle from upper area near manifold

[no1trancefan]

Cant be sure but have a rattle/squeake which think is coming up where the two form a single pipe furher up the cat.

Had mot week ago without issue. Put my decat pipe on after seems on solid. Isnt a noise at specific revs seems to squeak going along at various speeds cant see anything obvious.

Any ideas where to start?

[no1trancefan]

fixed it was one of the exhaust hanger rubbers