As stated in my first post it couldn't be me triggering STM due to:
a) Not downloading anything at the time.
b) STM should stay at 2.5mbps on a 10mbps connection
I was fluctuating upto 3.6mbps and as low as 1.52mbps as per the speed test I posted, so I don't think STM would allow the 3.6mbps speed!
Point is moot really as the issue is past