Help request... Alternator/belt/battery issue?

[mbrightside]

Hi...
Was driving to work the other day and the battery light started to come on and off... Along with the abs light. Once stopped it would not start. Jump started it to get home.

Had the same symptoms on the drive back, but then the battery/abs light stopped coming on but the airbag light came on instead...

The battery is around 1.5 years old.

Now I am no expert, but is there a chance this could be that the belt needs replacing or is it more likely that the alternator is dodgy (or even battery??) eg if the belt is worn would it display these symptoms or does it either work or not work ( eg if it breaks??)

Thanks in advance for any advice!!