###Answer the question from the input provided. Please answer from input only.

###Input: The most frequent musical contributor during the first 15 years was Dudley Simpson, who is also well known for his theme and incidental music for Blake's 7, and for his haunting theme music and score for the original 1970s version of The Tomorrow People. Simpson's first Doctor Who score was Planet of Giants (1964) and he went on to write music for many adventures of the 1960s and 1970s, including most of the stories of the Jon Pertwee/Tom Baker periods, ending with The Horns of Nimon (1979). He also made a cameo appearance in The Talons of Weng-Chiang (as a Music hall conductor).

All the incidental music for the 2005 revived series has been composed by Murray Gold and Ben Foster and has been performed by the BBC National Orchestra of Wales from the 2005 Christmas episode "The Christmas Invasion" onwards. A concert featuring the orchestra performing music from the first two series took place on 19 November 2006 to raise money for Children in Need. David Tennant hosted the event, introducing the different sections of the concert. Murray Gold and Russell T Davies answered questions during the interval and Daleks and Cybermen appeared whilst music from their stories was played. The concert aired on BBCi on Christmas Day 2006. A Doctor Who Prom was celebrated on 27 July 2008 in the Royal Albert Hall as part of the annual BBC Proms. The BBC Philharmonic and the London Philharmonic Choir performed Murray Gold's compositions for the series, conducted by Ben Foster, as well as a selection of classics based on the theme of space and time. The event was presented by Freema Agyeman and guest-presented by various other stars of the show with numerous monsters participating in the proceedings. It also featured the specially filmed mini-episode "Music of the Spheres", written by Russell T Davies and starring David Tennant.

Six soundtrack releases have been released since 2005. The first featured tracks from the first two series, the second and third featured music from the third and fourth series respectively. The fourth was released on 4 October 2010 as a two disc special edition and contained music from the 2008–2010 specials (The Next Doctor to End of Time Part 2). The soundtrack for Series 5 was released on 8 November 2010. In February 2011, a soundtrack was released for the 2010 Christmas special: "A Christmas Carol", and in December 2011 the soundtrack for Series 6 was released, both by Silva Screen Records.

The original logo used for the First Doctor (and briefly for the Second Doctor) was reused in a slightly modified format for the 50th anniversary special "The Day of the Doctor" during the Eleventh Doctor's run. The logo used in the television movie featuring the Eighth Doctor was an updated version of the logo used for the Third Doctor. The logo from 1973–80 was used for the Third Doctor's final season and for the majority of the Fourth Doctor's tenure. The following logo, while most associated with the Fifth Doctor, was also used for the Fourth Doctor's final season. The logo used for the Ninth Doctor was slightly edited for the Tenth Doctor, but it retained the same general appearance. The logo used for the Eleventh Doctor had the "DW" TARDIS insignia placed to the right in 2012, but the same font remained, albeit with a slight edit to the texture every episode, with the texture relating to some aspect of the story. The logo for the Twelfth Doctor had the "DW" TARDIS insignia removed and the font was subtly altered, as well as made slightly larger. As of 2014, the logo used for the Third and Eighth Doctors is the primary logo used on all media and merchandise relating to past Doctors, and the current Doctor Who logo is used for all merchandise relating to the current Doctor.

Premiering the day after the assassination of John F. Kennedy, the first episode of Doctor Who was repeated with the second episode the following week. Doctor Who has always appeared initially on the BBC's mainstream BBC One channel, where it is regarded as a family show, drawing audiences of many millions of viewers; episodes are now repeated on BBC Three. The programme's popularity has waxed and waned over the decades, with three notable periods of high ratings. The first of these was the "Dalekmania" period (circa 1964–1965), when the popularity of the Daleks regularly brought Doctor Who ratings of between 9 and 14 million, even for stories which did not feature them. The second was the late 1970s, when Tom Baker occasionally drew audiences of over 12 million.



###Question: Who has performed all the Doctor Who music since the 2005 Christmas special?

###Answer: {'answer':'the BBC National Orchestra of Wales'}