Well if your having problems with your BTopenworld Adsl service like slow speeds and that includes a lot of other Adsl services which use BT's network.
The following links allow you to download an application which will allow you to set your MTU size to 1458. Only use this application if previously advised by a helpdesk analyst. BTopenworld MTU Tweaker Customer Trial
The following links allow you to download an application which will allow you to set your MTU size to 1458. Only use this application if previously advised by a helpdesk analyst. BTopenworld MTU Tweaker Customer Trial