Having a little issue with the car at the minute, wondering if someone could help diagnose the problem.

Noticed it thisafternoon, went out to the car, started it up to defrost - sorted some things out in the boot. When I got back into the car I noticed a slight plasticy smell - Had a look under the bonnet to find the smell again.

I had to drive home from work so I drove home, noticed a slight sqeaking sound from the engine - sounded abit like the aux belt when it slips slightly (I replaced that last month along with the tensioner)

Had to pop out tonight and the battery light came on - I replaced the battery 6months ago.
I havent had a chance to pop out with a multimeter or opcom yet but going to hunt around the net for a new alternator - does this sound like it could be the issue or something abit more serious?

Thanks!