BBC Prime

1st Logo (1995-1997)
Logo: On a light gray background, we see a close view of a piece of a diamond, then two and three pieces, and finally a complete diamond. Finally, the screen fades to a complete view of all the pieces of diamond, with the BBC Prime logo on a corner. The ident continues with the light rays moving.

Technique: Unknown.

Audio: Unknown.

2nd Logo (1997-2000)
Logo: On a blurry background of magenta, and  colors, we see different views of a transparent sphere, then a flash happens, revealing two marbles on a water floor (a white one above, and a black one below). Ripples appear in the water with the music rhythm. Below can be seen the new logo.

Technique: Live-action.

Audio: Unknown, followed by a calm tune. Guitar notes occur during the rest of the ident.

3rd Logo (2000-2006)
Logo: On a colorful background, cartoony versions of different UK monuments (like the Big Ben, the Tower Bridge, the Stonehenge, etc) appear while several fireworks explode in the background. Finally, a big explosion happens, and the rest of the animation consists of several scribbles and firework explosions appearing and moving across the screen.

Technique: Unknown.

Audio: Unknown.

4th Logo (2006-2009)
Logo: Unknown.

Technique: Unknown.

Audio: Unknown.