Eurostar's announcement that it is to cancel all of tomorrows (Sunday) services was only made within the last few hours, so its hardly surprising that the booking systems have not yet been updated while bmi source the aircraft and crews at such short notice and at such a busy time. In any event, the website booking system already shows 2 of tomorrows rotations being A319s instead of the rostered ERJs.

Kudos to bmi for reacting so quickly to an unprecedented situation.