Yes you won't need to change a single thing on your WRT, just do the steps mentioned on the superhub and BAM, everything is back to normal.
Virgin are wanting to charge a £30 fee to upgrade fom 20 to 30Mb
Your up to 20Mb broadband is fast, but we're writing to let you know about the launch of our new up to 30Mb broadband speed. The good news is that we're offering it to you as a valued up to 20Mb customer first, for a one off fee of just £30, and no extra monthly cost.