Will bags be checked through?

We have booked EX-BRU flights to LAX and I'm now worrying about what will happen.
Our flight from BRU-LHR is the day before our LHR-LAX flight so will we be able to travel "hand luggage only" from BRU-LHR and then check-in again at the Virgin counters at LHR the next morning in order to check-in our luggage?
Similarly, on the way home our LAX-LHR flight is the day before our LHR-BRU flight: I assume when checking in at LAX the agent will not tag the bags through to BRU so that we can collect them at LHR?
Thanks!
Our flight from BRU-LHR is the day before our LHR-LAX flight so will we be able to travel "hand luggage only" from BRU-LHR and then check-in again at the Virgin counters at LHR the next morning in order to check-in our luggage?
Similarly, on the way home our LAX-LHR flight is the day before our LHR-BRU flight: I assume when checking in at LAX the agent will not tag the bags through to BRU so that we can collect them at LHR?
Thanks!