"Virgin Media website, we reserve the right (at our sole discretion) to reduce, suspend or terminate your Internet access. During any time of reduction or suspension, you will remain liable for the payment of your original level of Internet access charge. We also reserve the right (at our sole discretion) to re-grade your Internet access to a different speed and/or usage allowance at the appropriate charge. If we make such changes we will notify you as soon as possible."
Terms and conditions (legal stuff) para.4i.