I believe these channels only broadcast for limited periods on Freeview.
ITV3+1 only broadcasts from 6PM to midnight
ITV4+1 broadcasts 5AM to 7AM
ITVBe+1 broadcasts 4AM to 5AM
Only the first one is an actual timeshift channel (broadcasting ITV3 shifted by 1 hour). The other two are just placeholder channels, broadcasting teleshopping to allow ITV to retain the EPG slot on Freeview.
