I fear the worst 
On the way home tonight my car has hesitated three times (5 mins apart from each other) on light constant throttle, slightly uphill.
On two of the hesitations I felt the power decrease for about half a second (maybe not even that long) - on the third hesitation it came and went like a really quick pulsing sensation for about 5 seconds then went away again.
Engine was nice and warm when it did it, i'd been driving for 10mins before it hesitated for the first time...
After the 2nd hesitation I booted it to see what was what, it gave a moderate puff of smoke (which it sometimes does and sometimes doesnt) and because I was driving alongside a wall the noise from the engine was bouncing back, something sounded awful!! Really hard to describe - kinda like high pitch noise with a rough sound to it.
This is where I cry now, turbo failing?

No VAG-COM errors, the only error its had since I've had it was a glow plug error which SEAT said one of the glow plugs must of just out of tolerance so threw up a error code/light.
SEAT didn't replace the glow plugs as they found no evidence that it was failing, and once they cleared the error it never came back...that was about 4/5 months ago now.
Help
On the way home tonight my car has hesitated three times (5 mins apart from each other) on light constant throttle, slightly uphill.
On two of the hesitations I felt the power decrease for about half a second (maybe not even that long) - on the third hesitation it came and went like a really quick pulsing sensation for about 5 seconds then went away again.
Engine was nice and warm when it did it, i'd been driving for 10mins before it hesitated for the first time...
After the 2nd hesitation I booted it to see what was what, it gave a moderate puff of smoke (which it sometimes does and sometimes doesnt) and because I was driving alongside a wall the noise from the engine was bouncing back, something sounded awful!! Really hard to describe - kinda like high pitch noise with a rough sound to it.
This is where I cry now, turbo failing?
No VAG-COM errors, the only error its had since I've had it was a glow plug error which SEAT said one of the glow plugs must of just out of tolerance so threw up a error code/light.
SEAT didn't replace the glow plugs as they found no evidence that it was failing, and once they cleared the error it never came back...that was about 4/5 months ago now.
Help


Actually don`t respond to that..