Re: And the next step...
"as someone else has posted, its totally possible to send tcp & udp packets with false source ip addresses."
On what ISP does that work? I'm not aware of any now.
Talktalk would be fully aware of what their customers did or didn't do. To suggest talktalk would route packets with an invalid source address and still have no idea is absurd.
With the fake source IP address, what would you use as the df gateway? What routing protocol would forward it and under what circumstance? Why would BGP forward it?