Not starting ;(

[Shutterbug]

Went to take my son swimming today and the car would not start. It made a very loud ticking sound but just would not turn over.

Now, I had the battery replaced about 2 weeks ago, so definitely shouldn't be that, and they checked the alternator at the same time, and said all was okey dokey.

It's making the same sound as when the battery was on its last legs, but unlike that time, it's not got quieter on trying it, it's remained very loud.

It's been parked up outside for almost a week, and as we all know, it's been rather cold.

It is coming up with a low coolant warning on turning the key and did flash up with "braking failure stop safely" when we turned the key but it was obviously stopped and in park at the time.

Do you think it's the cold? It was about 2 degrees when I tried starting it.