The London data center had some connectivity issues today from around 2:30a UTC to around 8:00a UTC. This should all be resolved now. Other than this, the server has been running normally. I usually give the server a restart nightly but this is really just out of habit as it doesn't really seem needed anymore since the update to v469.
You should get and run a mtr program, if you don't have one already, so you can pinpoint network issues when they happen. You will find that it usually isn't the server that is the cause. The server is monitored regularly and kept well within its limits. Playing from your distance there are probably a dozen hops or so that are run much closer to their limits than the server is.