Just to clarify: the relevant portion of he article (not my text) currently reads:
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[quote]
Harris has also performed with Richard and Linda Thompson, and has been a composer for the BBC on various broadcast plays, as well as for live theatre. She is also a singer and has written music for choral groups.[citation needed]

More recently, in 2008 she was leader of the "Wild Angels Community Choir" in Welshpool, Powys, Wales.[10]

Following the World Dulcimer Congress held in Malvern, Worcestershire in 2015, Harris formed the English Dulcimer Duo with Lisa Warburton. The duo has toured extensively, performing a repertoire of English and Welsh tunes.[11]

[end quote]
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Where citations are given, e.g. [10], [11], the text is probably fine although possibly could still be incomplete. Where it says [citation needed], Wikipedia (these days) needs at least a reliable source for this information; better still would be some unpacking as to what plays, what live theatre, which choral groups... (you will see the general idea). The focus, again these days (maye not always so in earlier times) is to convey information that is correct (hopefully!), reasonably detailed, and verifiable from "reliable" third party sources.

Thanks for reading!

- Tony