Opening locked doors with no power

[Doodle]

Unfortunately the D3 has just chosen to self-immolate in the work car park. Damage is confined to the engine bay but the car is electrically dead, which gives the conundrum of opening the door.

The fire brigade have sawzall'd the drivers window for access to the bonnet release as it wouldn't smash (yay for double glazing) but the interior door handle does nothing.

Is there an override somewhere so I can get access and empty it of personal effects before it's collected by the insurance company?