iPod Ipod Classic- Customs Tax Query

Hi my aunt has currently gone to Canada on holiday and ive asked her to bring me back an Ipod Classic as its way cheaper than the UK.

I wanted to know

Customs Tax is obviously likely- Will she get taxed upon bringing back to the UK does she need to declare this?

Is there anyway in dodging the system? Obviously i know its a crime, but how much charge is accumulated and does she need a proof of purchase at the point of declaring it?

Also what would it been for the warranty, can i still and register and make use of the 1 year warranty in the event it breaks down.

Would posting be a cheaper option from Canada to UK out of interest?

Any help or suggestions would help me loads.

Kind Regards,

ColdAsIce