Buying orange phone from 3rd party; and free broadband?

Hi i am thinking of getting a new phone with a new orange contract (one of the £30 ones). if i buy the phone (with contract) from a third party place like phones4u, will i be able to make use of the free broadband offer from orange? how would i go about doing this?
Answer
Check to see if the offer still includes a free laptop too. i saw this about 2 months ago, i think it was on the pcworld web site.