This is it, no-one is.

No-one has access to the admin password changed to one only i know

Yes i understand how mad it sounds but this is what's happening

lol there is nothing i haven't told, the logs have been seen by plusnet via this thread (via pm)
No Trogan either.
Just going to keep an eye on it and put it in a better place to see if/when the wifi button is on/flashing.

Have you checked the router up time after the wireless has reenabled? Just wondering if it is following some sort of disconnect/reboot?

No, but thanks for the thought will check if/when it does it again.

Have you done a Factory reset on it? (While it's on, gently but firmly press the end of an opened up paper clip into the Reset hole and hold the switch in there down 5-10 seconds until the lights on the router start to flash).

I did recently when i had a connection problem, not since.

Done it again pm sent to orbrey with the log.

Ok the router is doing this again, the mac code is my sons phone.
The wi-fi is turned off at night the phone keeps trying to connect when his wi-fi is switched on, on his phone.
It made numerous requests to join the closed wi-fi and by the morning the wi-fi was flashing on the router.
He turned his wifi off over night and obviously couldn't try t connect and the router light for wi-fi was off, as it should be.

Plus net said previously this can't happen.

I wonder if it has anything to do with the change of day/date at midnight?

In reply to a post by eckiedoo:

I wonder if it has anything to do with the change of day/date at midnight?

It tries various times though the night.

Acknowledging that it tries at various times; but is there any commonality in when the WiFi actually switches on?

For example, is it always in the first hour after midnight?

Or is it truly scattered, from minutes after you switch the WiFi off in the evening, to some time just before you notice it is back on? Difficult!

Could there be some external stimulus, such as a timer switching on heating?