The 40GB usage package is still offered as an existing product.
Offered ... existing? Do you mean the 40GB package still exists
for existing custs? The only offering done by BT today is to new custs of either 10GB or Unlimited ADSL packages.
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 20 Meg WBC