Depends on how long since last re-sync, which is shown on diff screen

.
Orange say they do not control interleaving; all down to the DLM.
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 19 Meg WBC