Drop in upload speed.

[#1]

Overnight BT were doing some maintenance work in my area and I had a disconnection at about 03-00. Before then I had been seeing upload speeds of about 1.00Mb/s as shown by a copy of the speed test. 8/30/2014 9:12 AM GMT 83.xxxxxxxx 12.22 Mb/s 1.00 Mb/s 34 ms
Now the upload speed has dropped by a quarter to 0.76 Mb/s. 9/3/2014 9:35 AM GMT 80.xxxxxxxxxx 11.72 Mb/s 0.76 Mb/s 34 ms
This is not a real problem but I just wondered whether this speed has been limited for any reason as router stats are shown below and does 888 up mean the maximum that I will get?
Uptime: 0 days, 7:27:25  Bandwidth (Up/Down) [kbps/kbps]: 888 / 14.167

[#2]

Hi Salmo,
Sorry to hear the upload speed has dropped, from looking at the results you've seen in the past as well as what you're seeing now, you're still most definitely uncapped on the upload. Rather strange that this has dropped after routine maintenance, could you private message me with your account username and I'll take a look at the line stats for you.

[#3]

Hi Adam
I think I've sent you a message. If I've messed it up let me know and I will try again.
Thanks

[#4]

Thanks for the messages Adam.
I'm content to leave it for a while and see how it goes. Interleaving was applied when I had an intermittent fault well over a year  ago. I am happy for it to stay on if it means a more stable connection.
Thanks for your help.