Hi, I switched to Plusnet a week ago. Since then my broadband connection has been dropping at least twice a day, for maybe five minutes at a time. ADSL stays up, it's just the PPP connection that drops.
I'm on the same phone line as always, and have had several ISPs over the years with no major problems.
The log on my router shows this when disconnect/reconnect event happens (note the four minutes elapsed time, in this case):
10/3/2016 11:26:14> Call drop because echo reply not received in time