Seriously rubbish latency and Broadband 13/2

[#1]

Problem seems to have started mid afternoon today, but this evening Online games are unplayable, minimum latency 600ms withour braodband pro. usually sits a happy 30-40ms on WoW all night.
BT test shows DL at 2.00 and upload at 0.09, pretty shockingly low results.
Speedtest .net similar:    http://www.speedtest.net/result/2506930782.png
Have messed about with 2nd router, always cabled to gaming pc anyways no wireless rubbish!, Put computer into DMZ etc and results still the same.
Tracerts to BBC and wow servers giving 500ms + at every hop after our own router.
Can anyone shed any light on this issue?

[#2]

Go here:
http://usertools.plus.net/@gateway/
Are you on PCL-AG07 or 08?  If so, it is this:  http://community.plus.net/forum/index.php/topic,111170.0.html
Disconnect and reconnect your router and it should go away.  (or hang around for 10 mins or so and someone will have fixed it)

[#3]

I'm on ptn-ag02, what the hells going on ?

For years my ping time used to be 23 to 26ms as shown in my signature with 2ms jitter, but for weeks now the lowest I've seen was 44ms.
Why has my ping time doubled ?

[#4]

You are currently connected to the gateway known as pcl-ag01
Have restarted router several times for various durations this afternoon/this evening, results in the same latency within about 5-10 mins or reconnection, sometimes a bit better sometimes a bit worse, this time for example 400 ms instead of 600ms, but thats a mile away from my usual 30....

[#5]

Can you guys do some traceroutes to www.bbc.co.uk and paste them here.  Also, complete the btspeedtest and paste the results.  (Including the "further diagnostics" page)
http://speedtest.btwholesale.com/

[#6]

$ mtr bbc.co.uk
HOST: My_Computer                 Loss%   Snt   Last   Avg  Best  Wrst StDev
  1. My_ADSL_Gateway               0.0%    10    3.0   5.5   3.0  11.2   2.9
  2. lo0-central10.ptn-ag02.plus. 10.0%    10  170.5  89.8  56.1 170.5  36.5
  3. link3-central10.ptn-gw01.plu 10.0%    10  162.6  84.9  46.4 162.6  32.2
  4. xe-1-2-0.ptw-cr01.plus.net   10.0%    10  317.2  92.7  41.0 317.2  86.2
  5. ae2.ptw-cr02.plus.net        10.0%    10  438.8 115.4  44.5 438.8 123.8
  6. ae2.ptw-cr01.plus.net        10.0%    10  562.6 125.8  45.8 562.6 164.7
  7. kingston-gw.thdo.bbc.co.uk   10.0%    10  679.0 136.0  40.9 679.0 204.3
  8. ???                          100.0    10    0.0   0.0   0.0   0.0   0.0
  9. ae1.er01.rbsov.bbc.co.uk     10.0%    10  874.6 157.7  42.8 874.6 269.3
 10. 132.185.255.60               10.0%    10  889.6 158.0  39.6 889.6 274.8
 11. virtual-vip.thdo.bbc.co.uk   10.0%    10  798.5 146.8  42.2 798.5 244.9

[#7]

BT Test 22:38
Download speed 5.47 mbps
Up speed : 0.07
Ping : 375.50
When going to the further diagnostics received folowing:
The Performance Tester is currently unable to run a speed test for your broadband connection. Please try again shortly, however if this problem persists, raise the issue with your service provider.
Tracert to BBC site
Tracing route to www.bbc.net.uk [212.58.246.95]
over a maximum of 30 hops:
 1    <1 ms    <1 ms     1 ms  192.168.2.1
 2   528 ms   494 ms   569 ms  lo0-central10.pcl-ag01.plus.net [195.166.128.182]
 3   713 ms   620 ms   674 ms  link5-central10.pcl-gw01.plus.net [84.93.249.8]
 4     *        *        *     Request timed out.
 5   552 ms   579 ms   777 ms  ae2.pcl-cr02.plus.net [195.166.129.7]
 6   467 ms   663 ms   567 ms  ae2.pcl-cr01.plus.net [195.166.129.6]
 7     *        *        *     Request timed out.
 8   258 ms   257 ms   208 ms  kingston-gw.thdo.bbc.co.uk [212.58.239.6]
 9     *        *        *     Request timed out.
10   618 ms   679 ms   565 ms  ae0.er01.cwwtf.bbc.co.uk [132.185.254.93]
11   760 ms   799 ms   605 ms  132.185.255.165
12   523 ms   473 ms   551 ms  bbc-vip016.cwwtf.bbc.co.uk [212.58.246.95]
For the fun  my tracert to Blackout battlegroup on World of Warcraft aswell
Tracing route to 213-155-152-66.customer.teliacarrier.com [213.155.152.66]
over a maximum of 30 hops:
 1    <1 ms    <1 ms    <1 ms  192.168.2.1
 2   563 ms   817 ms   523 ms  lo0-central10.pcl-ag01.plus.net [195.166.128.182]
 3   700 ms   632 ms   664 ms  link7-central10.pcl-gw01.plus.net [84.93.249.12]
 4     *        *        *     Request timed out.
 5   596 ms   553 ms   512 ms  xe-11-1-0.edge3.London2.Level3.net [212.187.201.209]
 6   484 ms   463 ms   394 ms  ae-0-11.edge4.London2.Level3.net [4.69.200.126]
 7   687 ms   670 ms   621 ms  ae-3-3.ebr1.London1.Level3.net [4.69.141.189]
 8   738 ms   777 ms   588 ms  ae-58-113.csw1.London1.Level3.net [4.69.153.122]
 9   646 ms   654 ms   673 ms  ae-1-51.edge5.London1.Level3.net [4.69.139.75]
10   542 ms   486 ms   330 ms  ldn-b5-link.telia.net [213.248.96.37]
11   548 ms   551 ms   451 ms  ldn-bb1-link.telia.net [80.91.248.217]
12   732 ms   997 ms   871 ms  prs-bb1-link.telia.net [80.91.254.209]
13   729 ms   754 ms   505 ms  prs-b7-link.telia.net [213.155.134.225]
14     *        *        *     Request timed out.
15     *        *        *     Request timed out.

[#8]

Both of those look rubbish.  Investigating.

[#9]

have been running tracerts to WoW all night, since about 5pm, all of them pretty similar, not had much better than 400ms on any hops in any of them.

[#10]

Are you speeds a lot lower than usual?  Or are you just seeing the really high latency?

[#11]

purleigh:  Your line is now interleaved.  That explains the jump in base ping (but not the variability of that ping to the beeb, the packet loss, or indeed why you've become interleaved).
Can you do that mtr again?

[#12]

Generally browsing has been a little slower than usual, facebook/gmail/these forums etc, but not disasterous, just noticeably slower, though around 6pm was pretty much grinding to a halt on all fronts for a time regardless of what we tried to do.
The latency itself has just been constant, After restarting router each time and reconnecting to WoW, it starts at 100ms but within 5 minutes is back up to 500ms+ every time, even been in the 2000+ range at points during the evening.
Have checked from several machines in the house aswell, do seem to be getting same sort of results on speedtests etc from all of them.

[#13]

@kelly -
Is it possible to find out when my line went to being interleaved ?
What would trigger a line to become interleaved ?, as far as I know my line has always been noise free and at maximum bandwidth for a max DSL line, i.e. 7.150Mbps.
What do I need to do to remove interleaving and ensure that it doesn't return ?
With the recent latency problems, I have not seen ANY drop in speed, but have seen frequent but short periods where multiple web pages don't load on first attempt but always subsequently appear correctly with a browser refresh - mostly on eBay !.
In an attempt to overcome these page loading problems, I have set my DrayTek gateway to reserve 25% of upstream bandwidth for QOS, and enabled "Outbound TCP ACK Prioritization" and "UDP Bandwidth Control", with some but not complete success.
Because I have lost significant upstream speed by enabling outbound QOS, would it be at all possible to upgrade my line AT NO COST TO MYSELF to "Max Premium" to uncap my upstream speed, so that I can assist you with debugging this issue with the fastest capability achievable on my connection ?

[#14]

Now it is well after midnight the mtr looks loads better  

$ mtr bbc.co.uk
HOST: My_Computer                 Loss%   Snt   Last   Avg  Best  Wrst StDev
  1. My_ADSL_Gateway               0.0%    10    4.4   4.4   3.0   6.8   1.4
  2. lo0-central10.ptn-ag02.plus.  0.0%    10   44.1  36.5  33.2  44.1   3.9
  3. link3-central10.ptn-gw01.plu  0.0%    10   42.1  43.5  41.6  50.9   2.7
  4. xe-1-2-0.ptw-cr01.plus.net    0.0%    10   42.8  43.2  42.2  45.1   0.8
  5. ae2.ptw-cr02.plus.net         0.0%    10   49.0  49.1  41.9  95.9  16.6
  6. ae2.ptw-cr01.plus.net         0.0%    10   42.7  50.3  41.9  91.1  15.4
  7. kingston-gw.thdo.bbc.co.uk    0.0%    10   43.5  45.4  42.1  64.7   6.9
  8. ???                          100.0    10    0.0   0.0   0.0   0.0   0.0
  9. ae1.er01.rbsov.bbc.co.uk      0.0%    10   47.9  44.3  41.5  53.8   3.8
 10. 132.185.255.60                0.0%    10   43.4  44.5  42.1  48.5   2.1
 11. virtual-vip.thdo.bbc.co.uk    0.0%    10   44.3  43.1  42.3  44.3   0.7

[#15]

I was just about to shut the computer down for the night, and thought just one more mtr -

$ mtr bbc.co.uk
HOST: My_Computer                 Loss%   Snt   Last   Avg  Best  Wrst StDev
  1. My_ADSL_Gateway               0.0%    10    4.4   4.4   3.0   6.8   1.4
  2. lo0-central10.ptn-ag02.plus.  0.0%    10  238.8  65.8  33.8 238.8  67.6
  3. link3-central10.ptn-gw01.plu  0.0%    10  194.4  76.0  42.1 218.2  68.9
  4. xe-1-2-0.ptw-cr01.plus.net    0.0%    10  103.4  68.6  41.9 174.3  44.9
  5. ae2.ptw-cr02.plus.net         0.0%    10   42.8  58.5  42.7 119.1  29.9
  6. ae2.ptw-cr01.plus.net         0.0%    10  272.0  71.3  42.0 272.0  71.5
  7. kingston-gw.thdo.bbc.co.uk    0.0%    10  137.2  93.6  42.1 246.8  81.8
  8. ???                          100.0    10    0.0   0.0   0.0   0.0   0.0
  9. ae1.er01.rbsov.bbc.co.uk      0.0%    10   43.7  64.8  41.7 189.5  48.5
 10. 132.185.255.60               10.0%    10  245.7  72.1  42.8 245.7  67.6
 11. virtual-vip.thdo.bbc.co.uk   10.0%    10  154.7  75.7  42.7 223.3  66.5

Not so great, but way better than earlier this evening.
Time for some ZZZzzzz's