Hi
I wouldn't worry about the spikes, it is more red packet loss from the top and periods of green extending upwards that start to show some problem. The spikes can be caused by our own use of the internet connection as well.
My trace route is different even though it is still TalkTalk
1 thinkbroadband-gw2.core-rs2.thdo.ncuk.net 15 15 0ms 2ms 4ms
2 po4-31.bdr-rt3.thdo.ncuk.net 15 15 0ms 5ms 72ms
3 te2-3.cr05.hx2.bb.gxn.net 15 15 0ms 1ms 3ms
4 tbc.ar85.ts1.bb.daisyplc.net 15 15 0ms 1ms 1ms
5 tbc.ar85.ts1.bb.daisyplc.net 15 15 0ms 0ms 0ms
6 <me>.ip.static.uno.uk.net 15 15 9ms 10ms 11ms
Hopes 1 and 2 are the same, then I go across to gxn.net, who are GX Networks Ltd (used to be Pipex) and I think are taken over by TalkTalk, then from there it is all Daisy Plc, they are unconnected to TalkTalk, so presumably not much of TalkTalk is used, i.e. they aren't providing my internet connection, just a hand off to else where.
It looks like Pulse8 are just reselling a TalkTalk product through and through, so they aren't involved at all apart from raising the invoices, I might be wrong but that is what it appears.
So the problem is down to TalkTalk it seems, or a problem with the exchange and particular backhaul being used being congested, but it doesn't appear like congestion which is very much around peak times, and you are seeing slow single thread downloads 24/7, that's more like a deliberate restriction or throttle.
Can you change supplier?
Regards
Phil