Is this liable to be BT Openreach mucking about

[#1]

My line is totally stable but yesterday when there was nobody in the house and the phone didn't ring (answerphone on) I saw this on the router log
Note sync before the problem was 4800kbps and after 4864kbps
Sun, 2011-12-04 10:06:29 - LCP down.
Sun, 2011-12-04 10:06:36 - Initialize LCP.
Sun, 2011-12-04 10:06:36 - LCP is allowed to come up.
Sun, 2011-12-04 10:07:37 - Initialize LCP.
Sun, 2011-12-04 10:07:37 - LCP is allowed to come up.
Sun, 2011-12-04 10:08:37 - Initialize LCP.
Sun, 2011-12-04 10:08:37 - LCP is allowed to come up.
Sun, 2011-12-04 10:09:37 - Initialize LCP.
Sun, 2011-12-04 10:09:37 - LCP is allowed to come up.
Sun, 2011-12-04 10:10:37 - Initialize LCP.
Sun, 2011-12-04 10:10:37 - LCP is allowed to come up.
Sun, 2011-12-04 10:11:37 - Initialize LCP.
Sun, 2011-12-04 10:11:37 - LCP is allowed to come up.
Sun, 2011-12-04 10:12:37 - Initialize LCP.
Sun, 2011-12-04 10:12:37 - LCP is allowed to come up.
Sun, 2011-12-04 10:13:37 - Initialize LCP.
Sun, 2011-12-04 10:13:37 - LCP is allowed to come up.
Sun, 2011-12-04 10:14:38 - Initialize LCP.
Sun, 2011-12-04 10:14:38 - LCP is allowed to come up.
Sun, 2011-12-04 10:15:38 - Initialize LCP.
Sun, 2011-12-04 10:15:38 - LCP is allowed to come up.
Sun, 2011-12-04 10:15:40 - CHAP authentication success

[#2]

We'd not really be able to tell TBH Jim, we're not aware of anything anyway. Do let us know if that starts to happen again though.

[#3]

openreach, work, sunday in the same sentence 
with a increase of 64kbps you sure a new 64 bit machine wasn't connected to your router at the time 

[#4]

Yes they do and weekdays they work 24 hours