network or isp problems, neather me or the isp know whats wrong

hi there ive been looking round the net for an ancer and thort i would come ask here as its always been a relibal source of infomation before

heres the problem;

ok so it started about 2 months ago when between about 11pm and 2 am the internet would slow on all the pc to between 56kbs and 23kbs till about 11/12 the next morning. so after a few days of this i call my isp ( its talk talk dont have a go normaly there good for what you pay and me miss's got me locked in to a contact) thay do all the normal line tests and follow there writen instructions to the letter, still no sucess so it carrys on them looking for about a month. thay find one falt on m1y line, nothing major thay said and repaired it. now the net worked fine that day and night, next day it started again but now the time it started to get earlyer and earlyer so i call them again thay get there network team to come cheack every thing and thay even call bt out costing me £140 (witch i got back btw) for call out and VAT. so nothing found thay think it must be there new roughter thay sent about 2days b4 this all started witch in fairness is what i bleved it to be. so new roughter and i spend out and install new cat-5e cables around the flat and new filters and new phone line for the filter so every thing is set up and working perfect no problem, then 3 days ago it all startes up agian the slow speeds but now it starts to slow down sooner than ever b4 yesterday (14 march 12) the internet dropped to 11kbps at 3pm and only just picked back up to 16.64mbps dose any one have any ideas or is it time to jump ship, pay the rest of me contract off and go find someone better i got a hnd in advance computer science and network engernearing and im stumped as is every one ive talked to atm im doing a tracert in cmd and the results are like nothing ive ever seen before here is the latest one done to bbc.co.uk

tracert www.bbc.co.uk

Tracing route to www.bbc.net.uk [212.58.246.93]
over a maximum of 30 hops:

1 2 ms 2 ms 2 ms 192.168.1.1
2 * * * Request timed out.
3 * * * Request timed out.
4 * * * Request timed out.
5 * * * Request timed out.
6 * * * Request timed out.
7 * * * Request timed out.
8 * * * Request timed out.
9 * * * Request timed out.
10 * * * Request timed out.
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 * * * Request timed out.
20 26 ms 105 ms 134 ms host-78-151-225-113.static.as13285.net [78.151.2
25.113]
21 119 ms 94 ms 34 ms host-78-151-225-124.static.as13285.net [78.151.2
25.124]
22 58 ms 36 ms 83 ms xe-11-1-0-rt001.the.as13285.net [62.24.240.6]
23 100 ms 32 ms 42 ms host-78-144-0-105.as13285.net [78.144.0.105]
24 297 ms 181 ms 143 ms xe-10-0-0-scr010.thn.as13285.net [78.144.0.224]

25 121 ms 77 ms 92 ms host-78-144-3-47.as13285.net [78.144.3.47]
26 * * * Request timed out.
27 * * * Request timed out.
28 116 ms 127 ms 101 ms ae0.er01.telhc.bbc.co.uk [132.185.254.109]
29 193 ms 136 ms 80 ms 132.185.255.148
30 79 ms 120 ms 113 ms bbc-vip112.telhc.bbc.co.uk [212.58.244.67]

Trace complete.

ive not seen one time out that much unless ive done it, yet its let me load this majorgeeks fine and every other site even the bbc one with a bit of a delay like

any ideas i would like this solved b4 i get bt or sky and rip out all me lines put new ones in to make it worse the building is only 3 years old and the exchange is at the end of the 100m long road :S

please help im at the end of a very long teather