Impressively, 50Mb in my part of BS37 has gone from being rock-solid to <5Mbps (quite often <3Mbps) at peak times, in the space of a month.
My Broadband Ping is a sample from yesterday where there was something happening between midnight > 2am, apart from some increased latency, there's no real evidence of the slowdown.
VM-CS have advised there's a utilisation fault with a review date of March, but I'm staggered at how bad it's got in, literally, a month. A speed-test just now, has got 2.78Mb/s down, 3.03Mb/s up.
Quite ironic really, after 6 months+ of problems with the TiVo-10Mb being finally fixed a few weeks back.