Hat Trick Productions

Background
This is the production company of Rory McGrath, Jimmy Mulville and Denise O'Donoghue, formed in 1986.

1st Logo (September 23-December 16, 1988)
Visuals: On a brown textured background, we see this disclaimer that "shines":

A HAT TRICK PRODUCTION FOR CHANNEL FOUR

© CHANNEL FOUR 1988

Variant: On the TV show This is David Lander, after the credits sequence is finished, a panel that contains videos played during the credits flips to this logo.

Technique: Basic CGI effects.

Audio: The end theme plays while this disclaimer is shown.

Availability: Can be seen on series 1 episodes of the UK version of Whose Line is it Anyway? as well as This is David Lander.

2nd Logo (August 5, 1998- )
Images=

Videos=

Visuals: On a purple and black gradient background, we see a drawing of a rabbit pulling a man of a hat (instead of a man pulling a rabbit out of his hat) with "HAT TRICK" in black (or in white on a black rectangle), then gives a "Ta-Da!" like pose. He then face his right, away from the viewers, and put his left hand on his hip.

Variants:
 * An early version of the logo exists, where the text and rectangle are completely absent, the background is a dark-to-light grey gradient, the illustration of the rabbit and the hat is slightly different and the logo casts a shadow on the ground. There is also no animation whatsoever.
 * There exists a still logo with the rabbit is just holding the man and not doing said pose.
 * Starting in 2020, the background is slightly darker.
 * On the American version of Whose Line is it Anyway?, the words "in association with" is added at the bottom.
 * Sometimes, it also shares the screen with other logos (including the 1997 BBC and 2013 ITV logos).
 * Both a still and in-credit version exists.
 * The latter version may also have a slight shade (either tinted black or purple) on the top corner.
 * On William of Orangedale, the word "NORTHERN IRELAND" appears underneath the logo.
 * On Bike Squad, the logo is placed on a gradient purple background.
 * On Power Monkeys, the logo is cropped and seen as an in-credit logo.

Technique: Traditional hand-drawn animation by The Morris Studio. More info can be seen on their website here.

Audio: The closing theme of the show or none. ABC, CBS and The CW airings played their generic themes.

Availability:
 * It appears on new seasons of existing shows produced by the company which are Have I Got News for You, the final season of the original UK version of Whose Line Is It Anyway? and Room 101.
 * Also seen on new shows produced by them such as The Kumars at No. 42, Episodes, Dinner Date, the American version of Whose Line Is It Anyway?, Rich House Poor House, Derry Girls, Mastermind (from 2019 onwards), Kate and Koji and Hypothetical.