The single biggest safety tip I would give in Leeds, especially to girls, is when you're on your own, don't walk down the street talking on your mobile phone. Some girls are incapable of walking anywhere without going on their phone, its like they feel they have to use every spare minute they have to talk on their phone. Some girls are so LOUD as well, especially the posh rah girls (which is an advert that you are not from Leeds and thus not streetwise).
Many a time Ive walked back from town, either in a dusky evening or at night, and there will be a girl 20 yards ahead talking on her phone and you can hear all the "Oh my God and he was LITERALLY STOOD RIGHT BY ME AT THE BAR...." inane chat, its just an advert for any mugger that this is an easy snatch, just run up behind her, grab it and run off.