All the station platforms are open to all elements so make sure your wearing clothing suitable for the weather as could be waiting nearly a hour for trains.
If you already have a bus pass for Coventry and need to get onto the WCML - head to Coventry Train Station, it will save you loads in the long run. NUN>BHM ~£15 return, COV>BHM ~£6 return.
Handy access to the WCML and cross countrylines if you want to avoid Birmingham. Trains between Leicester and Birmingham use the raised platforms at the far end of the station.