From May the 20th, Virgin 1 on Freeview will switch from 12 hours a day, to 24 hours a day. There will also be a Virgin 1 + 1 (1+1=2?) service added, but this will only be for 12 hours a day.
The change to 24 hours involves Virgin 1 moving to a different multiplex, so users may need to perform a channel re-scan to get the longer hours from 20th May.
