Line Drop Outs-any ideas?

[#1]

In a morning at approx the same time I get a drop out which only lasts a few seconds before correcting itself.  This has only happened since the 11/1/16 when openwoe repaired a line fault. down the close. 
Its more annoying than troublesome but as I am at a point of considering keeping PN (due to poor back up from openwoe) as my provider I am curious what could be causing this

[#2]

How are you monitoring that. does your whole service cease or is it just the wifi?
Would normally ask you to do a quiet line test  17070 option2 on a corded phone when the broadband was out but if its just seconds ????

[#3]

I am normally changing to a new web page and the router sign in page appears.  If I do nothing page comes up after a period (sometimes less than a minute).  If I look at the router I can see it restablishing the connection.    I suppose if I had phone handset next to pc I could check landline as you suggest if I was quick enough