Broadband speed dropped - IP profile stuck?

[#1]

Router says:
System up time:1 day(s) 08:05:51
                                Upstream Downstream
Current Rate (Kbps)     448         4672
Max Rate (Kbps)         1060       4864
SNR Margin (dB)         20          12.1
Line Attenuation (dB)   27         49.1
Errors (Pkts)              0            0
but BT Wholesale says 
Download speed achieved during the test was - 0.58 Mbps
For your connection, the acceptable range of speeds is 0.4 Mbps-2 Mbps.
Additional Information:
Your DSL Connection Rate :4.67 Mbps(DOWN-STREAM), 0.45 Mbps(UP-STREAM)
IP Profile for your line is - 1.25 Mbps
Broadband has been generally stable and quick since August last year, when I had problems for about a month.  Now it's all sliding downhill again...
Could anyone have a quick look see?

[#2]

Hi there,
It appears that your connection was dropping a lot on Friday, however that's stabilized since then. This will have caused the profile to be lowered, however I've just submitted an SNR reset that should have this sorted within the next few hours.

[#3]

Adam,
Thanks for the update.
This evening I have:
Current Rate (Kbps)    448     4064
Max Rate (Kbps)     1060   4352
SNR Margin (dB)      20     13.3
Line Attenuation (dB) 27      49.1
and
Download speed achieved during the test was - 1.19 Mbps
For your connection, the acceptable range of speeds is 0.4 Mbps-2 Mbps.
Additional Information:
Your DSL Connection Rate :4.06 Mbps(DOWN-STREAM), 0.45 Mbps(UP-STREAM)
IP Profile for your line is - 1.25 Mbps
So better but still looks a bit wonky...
I'll try a disconnect and reboot and see if that does anything...

[#4]

The SNRM rest (if it took) should have dropped the line and restarted it.
Looking at these stats, the SNRM Target still looks as though it is 12dB.  The synch rate is also lower.
When posting stats, can you please include as much information as is available - uptime and error counts are very useful.

[#5]

Apologies, uptime was 2 days and some hours, and there were no errors at all.

[#6]

All appears to be back to normal now, so thanks for the assist.

[#7]

Good to hear, thanks for letting us know.