British comedy use of the panel game format, including the long-running "Just a Minute" (from 1967 to date) and "I'm Sorry I Haven't a Clue" (from 1972), and The News Quiz (from 1977), which often broadcast a dozen of so episodes a year, normally split over two series broadcast at different points in the year. The success of the panel show format has in turn has influenced TV series like "Have I Got News for You" (from 1990), "They Think It's All Over" (from 1995) and Mock the Week (from 2005). . BBC Radio has continued to be a breeding ground for
I'm Sorry I Haven't a Clue since 1981." Samantha has sometimes been replaced by a Swedish stand-in, Sven, or occasionally another substitute, Monica. When Margaret Thatcher left office in 1990 Lyttelton introduced a scorer named Margaret. In an episode in November 1991 both Samantha and Sven were present but occupied with each other and unable to award points. The programme's scoring is completely nonexistent. Most of the show is scripted, but in rounds such as "Sound charades", where one team of panellists have to guess the charade of the other team, the answer may be obvious (usually a pun) but the opposing team are now actually