In reply to maybe_si:
Lifting weights (and bodyweight exercises) is best for fat loss as more muscle mass means you burn more calories, plus you want to gain strength.
I get 30 minutes lunch, and have a gym at work and usually manage to get in a routine of something like.
3 sets of pullups, dips, plank (10 of each then rest)
3 sets of bench press
3 sets of bent over dumbell rows
3 sets of bicep curls
Some stretches at the end
Post edited at 22:36