We noticed congestion (latency) on a number of our L2TP connected customers' connections between 6:30 and 9:00 last night. These are customers who connect in to us using L2TP from another Internet Service Provider (ISP). It may be that this latency is specific to a particular ISP and outside of our control. We will see if this happens again this evening (14th November) and will investigate further.
So far, we've not see the congestion/latency this evening.
This looks to be a one-off event - we only saw latency on Tuesday evening.