I seem to have had one at 12:07 am.
Went down at 12:04 and a few retries later it was back up at 12:07
Seems to be the same problem as the disconnections at the weekend, namely CHAP authentication failed
I don't think it's possible to get to anyone at Coms who would understand if you called them so just wait and see I guess.
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Dec 01 00:04:44 daemon pppd[13512]: Connection terminated.
Dec 01 00:04:48 daemon pppd[14149]: PPP: Start to connect ...
Dec 01 00:05:38 daemon pppd[14149]: CHAP authentication failed
Dec 01 00:05:38 daemon pppd[14149]: User name and password authentication failed.
Dec 01 00:05:38 daemon pppd[14149]: Connection terminated.
Dec 01 00:05:41 daemon pppd[14149]: PPP: Start to connect ...
Dec 01 00:05:50 daemon pppd[14149]: LCP: timeout sending Config-Requests
Dec 01 00:05:50 daemon pppd[14149]: Connection terminated.
Dec 01 00:05:53 daemon pppd[14149]: PPP: Start to connect ...
Dec 01 00:06:02 daemon pppd[14149]: LCP: timeout sending Config-Requests
Dec 01 00:06:02 daemon pppd[14149]: Connection terminated.
Dec 01 00:06:05 daemon pppd[14149]: PPP: Start to connect ...
Dec 01 00:06:51 daemon pppd[14149]: Remote message: CHAP authentication failure, unit 19883
Dec 01 00:06:51 daemon pppd[14149]: CHAP authentication failed
Dec 01 00:06:51 daemon pppd[14149]: User name and password authentication failed.
Dec 01 00:06:51 daemon pppd[14149]: Connection terminated.
Dec 01 00:06:54 daemon pppd[14149]: PPP: Start to connect ...
Dec 01 00:07:03 daemon pppd[14149]: Connection terminated.
Dec 01 00:07:06 daemon pppd[14149]: PPP: Start to connect ...
Dec 01 00:07:09 daemon pppd[14149]: Received valid IP address from server. Connection UP.