Yes, broadband should work out much cheaper than dial-up for any significant use and some of the providers offer monthly commitment or longer. Might be also worth looking at yearly contract, with acceptable cancellation terms.
Best to use a comparison website. if you cannot find, I am happy to locate and forward a link.
Indeed, just confirmed you can do a comparison on this site. If you cannot find item on menus, link is;
http://www.moneysupermarket.com/broadband/
Good luck.