BA new joiner, which fleet?

[Speedrock]

Hi all,

I'm a new Pruner, just wonderin'...I'm about to go for interview assessment with BA, does anyone out there know if new joiners are allowed to go straight onto the 777 fleet or do you have to "serve time" on 737 (my current type) or Airbus.

Also, if there is a min. requirement for LH does anyone know what this is?

Cheers

Speedrock