Due to a BT incident earlier for which we are still waiting clarification we are currently seeing an imbalance on the central pipes used for the @adsl.merula and @adsl.wizards realms. if your login is one of the above and you are seeing slow speeds you may like to diconnect and re-login in an attempt to change to the less congested central.
You may need to do this more than once since you have a 50/50 chance od re-connecting to the congested cental.
if we can get moew details from BT we will post them here