No axe to grind but just to balance things; on the 20Mb package, always got 18-20 so very happy, noticed at the weekend speeds were down to 10-ish, checked at 5am Tues as I was up early and they were 5Mb

Didn't have a chance to do anything 'til Wed evening, took the router (Apple) out of the equation and speeds now down to 1.5

Bit the bullet and called 151 at 19:00, through to India by 19:05, call was answered by tech who took over the machine, diagnosed bad power levels, booked an engineer for today 12:00-16:00. Other half called at 14:30, engineer been and gone, new modem, download showing 20.26Mb and new unit where the cable enters the house as 'it looked a little old and might as well do it while I'm here'

All in all very happy with the service, fixed within 19 hours of being reported