The speed test result is obviously wrong, due to using a browser that does not work well with the test. It would appear that IE11 and Edge do work.

Tested using both IE and Chrome, opened one at a time, the outcome here is that chrome is faster on all sites and the same at speedtest.net
-------------------------
BTwholesale speed test

IE 72.08/14.54
Ipprofile 73.46/20.

Chrome 115.79/12.22 ping 37.50

Ipprofile 76.98/20.
--------------------
Broadbandspeedcchecker

IE 33.09/14.19 ( painfully slow to complete !)

Chrome 72.86/19.26
-----------------------
TBB

IE 19.01/10.8

Chrome 35.0/11.1
-------------------------
Speedtest.net

IE 73.94/7.99

Chrome 73.28/17.99
------------------------------------
You can see why I use Chrome, and it's noticeably quicker on normal browsing.

More confusing than ever.

Following a cabinet move the BT BB availability checker displays the speeds available from the old cabinet 1200 meters away rather than the new 170 meters away.

Even though the modem sync is up my BB does not seem as quick at 80 than it did at 38, the problem now is which test to belive before contacting the ISP. (again)

I had not heard the BT and chrome problem before so I googled "does the chrome browser report incorrect broadband speed tests"

Found a few replys from 6/8 years back and then.

https://community.plus.net/t5/Fibre-Broadband/speedt...

Its a Known problem especially with Firefox

Mozilla support says its because BT test still using Flash not HTML5 , Plusnet have been in contact with BT several times but still await a fix from BT

AND
https://community.bt.com/t5/ADSL-Copper-broadband/Is...

Re: Is there a better, more accurate, speed test than the BT Wholesale code?
the btspeedtester has been giving incorrect results as others have posted but it appears to happen when firefox is used so can you try chrome or edge/IE and see if that helps get more accurate results, it is only test accepted by wholesale

HELP !.

So there is something wrong with the connection "my BB does not seem as quick at 80 than it did at 38" our test is designed to not mask this, whereas speedtest.net will often mask a slightly poor connection, i.e. it has better bragging rights but less diagnostic use.

I did say our test was showing things were not right with the connection, only thing now is to figure out where.

Using Chrome
Your standard BB test today gave 27.4/11.6 and burst 44.8/12.4
The special test version gave 41.28/12.9 and burst 45.6/14.
Using the download file test on port 80 I achieved 512Mb 69 sec, 200Mb 27 sec indicating a 60 Mb speed.

Using Edge, which the test takes much longer to load and complete
Your standard BB test gave 26.0/4.7 and burst 27.4/5
I could not complete a special version test with a can't reach page error, tried a few times.
Using the download file test I achieved 512Mb 96 sec, 200Mb 39 sec

Modem sync still 74.98/20.

Yesterday I made several changes to my setups, swopping out both modem and router.
Ran the tests on my PC and an old laptop (XP) and saw no noticeable speed difference with either setup.
I cannot see the problem being PC or laptop related, wiring, version of Windows, browser choice or connection method.
But what ?

http://tbb.st/1533984438772496555

Latency while idle
[41,46,39,43,39,46,49,70,49,40]
Latency while downloading
[4242,6455,5815,4719,3193,2781,7699,1768]
Latency when uploading
[42,42,53,45,50,46,49,42]

While we expect the latency to increase when the line is busy, the more normal would be a rise from 40ms to around 100 to 150ms.

With the latency so high what will be happening is that the packets saying we got that bit of data send the next will be seriously delayed and thus reducing your actual speeds.

This test http://tbb.st/1533982594604626055 gave a better set of speeds and the latency when downloading was [250,202,172,258,192,178,174,419] so more normal.

How sure are you that nothing is downloading other than the speed test?

Best test seems to have been http://tbb.st/1533897201501377455

The connection can deliver it seems, but results seem variable, cause unknown

Thanks for the insight into my issues.

I have today, starting around 11am, run 9 speed tests around 10 minutes apart and all using a 100Mb wired connection direct to the modem/router ( with one port so no AP etc ) guarantying nothing else is connected to my network.

First three from usual win 10 PC

Second three from laptop ( XP )

Third another Laptop ( XP )

The modem sync speed is as before (74.98/20) and my expectation at 170 meters from the cabinet was a throughput around 70Mb.( 96%)

Even your file download test never got anywhere near it.

I am not comfortable switching off anti virus software, the laptops are running AVG the PC Avast.
Using Chrome in all cases best I can tell there were no upgrades running on any of them during the tests.

Re packets being delayed, where does that message come from, is that the receiving computer task or some other network device ?.

At times all three computers have been connected to the network so could all be infected by the same virus ?.

A couple of weeks back I ran a speed test using a wifi Android device and the speeds were a little slower but much the same.

The DLM seems happy and the connections have been up for weeks, no reports of disconnection in router logs, sort of rules out bad wiring.

Do you think that the incorrect BT record re available speed at https://www.btwholesale.com/includes/adsl/main.html might be influencing a network device somewhere ???.

I'm told an official engineers login contains details for two cabinets.

Thanks

Re packets being delayed, where does that message come from, is that the receiving computer task or some other network device ?.

Without testing your computers on a known working well connection hard to say i.e. so can rule them out.

The question is this, when someone else is web browsing is a second person web browsing seeing pages sometimes load slowly?

If this was a virus effect, it would be showing as constant traffic and easy to spit by using Windows Task Manager and looking at the traffic over the network interface.

DLM is only worrying about the DSL elements, i.e. that 100 to 200m of copper, what happens on your PC and from cabinet back to the Internet is where your problem is likely to be.

Do you think that the incorrect BT record re available speed at https://www.btwholesale.com/includes/adsl/main.html might be influencing a network device somewhere ???.
NO

http://tbb.st/1534073014850086155
http://tbb.st/1534072458325314555
http://tbb.st/1534071879148691055
http://tbb.st/1534071261563727355
http://tbb.st/1534070602316870455
http://tbb.st/1534070008672272355
http://tbb.st/1534069347409989255
http://tbb.st/1534068508656304455
http://tbb.st/1534068007750044755

When I said posting the speed test links, this is what I meant, as makes it easy for people to look at the data, rather than rely on longer verbal descriptions.

I'm told an official engineers login contains details for two cabinets.

Can you expand on what this means?