From time to time, BBC ONE airs idents and presentation themed for special events or individual programmes.
Pedal Power - an ident to mark the science-based series 'Bang Goes the Theory' that began 27th July 2009.
Glitterballs ident - first shown before 'Strictly Come Dancing' on Saturday 7th November 2009.
'EastEnders' celebrates its 25th anniversary in February 2010. In this ident, the soap square becomes 'Albert Circle'.
Saturday Entertainment is the theme for this ident introduced 24th April 2010. Created by Red Bee Media and Aardman, it caricatures the celebrities and shows featured on BBC ONE on Saturday evenings.
For St David's Day, BBC ONE Wales plays out this celebratory ident - in use from 2007. In the first video, it is followed by the BBC Cymru Wales symbol from 2010. Used annually, the second video was captured from BBC ONE Wales HD in 2014.
The Magic Forest ident has been customised by Rolf Harris for his four-part series 'Rolf on Welsh Art' that aired from 16th February to 9th March 2011. It is followed by the 2011 BBC Cymru Wales symbol.
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A duck ident to introduce Wild Week on BBC ONE Northern Ireland in May 2011 - a week long series of wildlife programmes from across the province. Later added into BBC ONE Northern Ireland's standard rota of idents, and also updated for HD.
Specially created ident for BBC One's 'Planet Dinosaur' natural history series in September 2011.
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Ident for the nature documentary series 'Frozen Planet' which first aired 26th October 2011.
Two idents announcing 75 years of television from the BBC on 2nd November 2011. Both are preceeded by a short sting that flips through the BBC's corporate logo over the past decades. The first of these announcements was made at 9.30am after 'Breakfast' and the second was at 7pm before 'The One Show'.
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Continuing a tradition that has developed over the past decade or so regarding major sporting events and commemorative idents, BBC ONE Wales celebrated the winning of the 2012 Rugby Union Six Nations Championship Triple Crown on 25th February with this special 'BBC Won' ident.
Introducing Huw Edwards' 'The Story of Wales' - a special ident from BBC One Wales seen on St David's Day 2012.
'Planet Earth Live' began on Sunday 6th May 2012 - an ambitious natural-history series documenting the real-time stories of animals around the world at this important time of year in nature's calendar.
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Comic Relief ident shown in 2009, as previously used in 2007.
Comic Relief 2011 ident. Also used in 2013 and 2015.
Children in Need
Featuring a World Record attempt by Blue Peter for the most people in an 'over and under' competition earlier in the month, this is the ident for the BBC's annual charity fundraising show 'Children in Need' shown at 7pm on Friday 16th November.
Following the 10pm news, Pudsey waved in the second part of Children in Need over the Hippo ident at 10.35pm.
Trailer for the Children in Need highlights show on BBC One Scotland.