Pace Sky plus User Manual page 46

The start and end of the recorded programme are always displayed as
the first and last bookmarks.
Use the arrows to highlight a bookmark, then press select to resume
playback from the selected position.
If there are more bookmarks than can be displayed on the screen, you
can display other parts of the list by using the Page Up (red) and Page
Down (green) keys.
To remove a bookmark, highlight it, then press the Delete (yellow) key.
The updated list is redisplayed with the bookmark removed.
42 Sky+ User's Guide