Migrate to Plusnet, using your existing modem. You have to have your existing speed to start with, once on you can change.
£14.99 pm, on a monthly basis, ie. no minimum contract. This is for 1MB, 1GB per month.
You get 500MB webspace. My (temporary) site is only 1MB (.4%) click here
Please choose your username with care, as your Email address will be anyname @ username.plus.com