Stagecoach MCSL - Chester & Wirral Depots

[E400]

RE: Stagecoach Chester & Wirral
Saw a Volvo B10BLE on the 471/472 earlier this morning during rush hour, and it was absolutely packed. Later on at about 10am I saw an Enviro 400 on either the rail replacements or the 1/2. Anybody able to confirm this decker allocation? Seems strange to have a single decker on the 471/472 and a double decker knocking around elsewhere, especially if it was on the rails.