@ Silverlegacy. Yes, your can is on the way out.
The only good news is that if money's tight you can bodge it for a fair time. I used high temp silicone sealant to bung up the gap between the inner and outer bits where the pipe enters the can. It did get through a couple of MOTs that way, but the rattle got too irritating in the end.
The problem is the inner mild steel rusts through down at the bottom (despite the drain holes).
I dismantled mine:
You can see the two inner flanges have rotted through (ignore the slot in the stainless to the left, that's just my clumsy hacksawing). Not shown is the mesh sleeve that the internals are spot-welded to, that's surrounded with mineral wool before being slid into the stainless outer. The mesh gets rusted away at the lower end too so quite a bit of the wool had blown out.