I have 2 or 3 disconnects per 3 hour timeframe when raiding with others.
This happens exclusively with Virgin Media - I never had issues with BT. My gaming friends who experience the same disconnects are also with VM. My gaming friends not with VM never disconnect.
This is mildly infuriating because I’ve seen many posts here go without response. They’ve even gone as far to have ArenaNet investigate and provide information, but it doesn’t seem anything has been done to resolve it.