Available on T-Mobile when you buy the USB modem for £200 and pay a monthly charge of £20 on a 24 month contract with 3GB monthly data allowance. This is £680 for the modem, line rental and data usage for 2 years.
Also available on 3 with a FREE USB modem, 3GB monthly allowance, £35 per month for 18 months and 200 free texts per month. That works out just slightly cheaper at £630.
The laptop is listed as a HP 6720... i can't give the exact spec as it seems that this covers a range of laptops.
Purchase via QuidCo.com for £60 in cashback. Remember to remove the TWO insurance packages they add to your basket as they add up to about £15 per month extra!!