With Virgin, you would have a minimum 12 month contract and I believe 12 months from any upgrade you make. So Virgin is not great if you want flexibility.
Broadband using a fixed phone line would incur line rental and a reconnection charge, as well as the contract period charges made by the Broadband company.
If you click on the green Broadband tab on Moneysupermarket above, you will see ' how to get the best broadband deal'. If you enter the postcode of the property where you will be living, you can see the details you need to know about. There are also sites online where you can enter the postcode to check what the broadband speeds are like. There is no point paying for a higher broadband speed on non cable services, if the house is located too far away from the exchange to make it worthwhile.
Re the line rental issue. It depends on whether you already pay line rental. The broadband companies will quote a price, with or without line rental. The with line rental option is for people that either don't pay it or are looking to swap arrangement and the without line rental is for people already paying line rental, who just want to set up broadband with another company.