I've been using OneTel:
www.onetel.co.uk for over a year now.
They charge 1p per minute on an 0808 dial up ( it is a free phone! )
Money is sucked from your credit card at the end of the month. Dial up is easy, speed is fine, never had a problem with the billing.
GA
[ 15 July 2001: Message edited by: Gentleman Aviator ]