Slow slow slow broadband speed...

Question

Can anyone help me with my broadband speed?
I have BT Broadband Option 3. For 4 years I have been getting a decent line speed of 2Mb. Over the last few weeks though this has dramatically and frustratingly dropped right down. I've completed a BT speedchecker and  placed the results below. For some reason it was telling me that my configured download throughput speed for this service was 750 k(I'm not sure what this means). I've also attached the broadband status details from my router.
Any help would be appreciated.
Cheers!
FAQ
Test1 comprises of two tests
1. Best Effort Test: -provides background information.
Download Speed
237 Kbps
0 Kbps
1000 Kbps
Max Achievable Speed
 Download speedachieved during the test was - 237 Kbps
 For your connection, the acceptable range of speedsis 200-1000 Kbps.
 Additional Information:
 Your DSL Connection Rate :15405 Kbps(DOWN-STREAM), 1155 Kbps(UP-STREAM)
 IP Profile for your line is - 750 Kbps
The throughput of Best Efforts (BE) classes achieved during the test is - 10.75:27.81:61.44 (SBE:NBEBE)
These figures represent the ratio while sententiously passing Sub BE, Normal BE and Priority BE marked traffic.
The results of this test will vary depending on the way your ISP has decided to use these traffic classes.
2. Upstream Test: -provides background information.
Upload Speed
355 Kbps
0 Kbps
1155 Kbps
Max Achievable Speed
>Upload speed achieved during the test was - 355 Kbps
 Additional Information:
 Upstream Rate IP profile on your line is - 1155 Kbps
We were unable to identify any performance problem with your service at this time.
It is possible that any problem you are currently, or had previously experienced may have been caused by traffic congestion on the Internet or by the server you were accessing responding slowly.
If you continue to encounter a problem with a specific server, please contact the administrator of that server in the first instanc
Line Mode
ADSL2+
Line State
Show Time
Latency Type
Interleave 
Line Up Time
00:01:41:42
Line Coding
Trellis On
Line Up Count
1
Line Power State
L0
Statistics
Downstream
Upstream
Line Rate
462 Kbps
444 Kbps
Noise Margin
32.2 dB
19.6 dB
Line Attenuation
29.5 dB
14.9 dB
Output Power
16.6 dBm
12.7 dBm
MSGC (number in overhead channel data)
61
24
B (number of bytes in Mux Frame)
14
18
M (number of Mux Frames in FEC Frame)
1
2
T (Mux Frames over sync bytes)
1
2
R (number of check bytes in FEC Frame)
16
10
S (ratio of FEC over PMD Frame length)
0.9688
2.6667
L (number of bits in PMD Frame)
256
144
D (interleaver depth)
32
8
Super Frames
376096 
376094 
Super Frame Errors
0 
17935 
RS Words
25198466 
12787196 
RS Correctable Errors
8 
32046 
RS Uncorrectable Errors
0 
0 
HEC Errors
0 
0 
OCD Errors
0 
0 
LCD Errors
0 
0 
ES Errors
0 
0 

Answer 1

I;m a little puzzled by your remark about getting a 2mb connection, even on adslMax ....
Because at that loop loss (line length) you should have done a lot better than that ... even on Max.
Now you are on an adsl2+ connection, which is being profile banded, which means capped in real terms,
and the connection is showing a profound level of interleave, which only really ratifies what I think is happening.
And that is ... you've always had a poor connection, even on adsl Max, but you were maybe not aware ...
And now you technically have a very poor adsl2+ connection, that requires some attention.
I'll point you to an old post of mine ... for some things to try.
http://community.bt.com/t5/BB-in-Home/Poor-Broadband-speed/m-p/14217#M8397
If a lot of the noise issues are sorted ... there is the possibility of a blistering internet connection on that line.