Some channels have changed number on Freeview. Although no channels have moved frequency, some equipment may require a retune for the changes to become visible (you may need to reset series recordings).
Starting with CCX TV, this channel has moved from 23 to 73. Dave Ja Vu (Dave +1) has made a similar move in the opposite direction, replacing CCX TV on 23, moving from 79.
A further 3 channels have made smaller moves. Jewellery Maker moves from 73 to 71. Shopping Quarter moves from 74 to 72, allowing Yesterday +1 to move from 75 to 74.
None of these changes appear to be as a result of a change in channel ownership, but Dave Ja Vu may give way to allow another UKTV owned channel to move to higher position in the EPG.