Both. Both types are due in for a replacement, with the
replacement of the Super Skyhawks seemingly more pressing, and with
the tendency of air forces to opt for a single type with regards to
a basic jet trainer and a LIFT, it looks likely the new trainer
would cover both requirements. I don't know which type will be
selected, but I think the Hawk 100-series and T-50 will be strong
contenders.
Just my opinion.