Margaret was born in Tonyrefail; she is the eldest daughter of Richard Williams and a founder member of the Richard Williams Singers, having sung with the choir since the age of eleven. In 1971, while Richard Williams was touring Czechoslovakia with his choir The Gentlemen Songsters', Margaret, at the age of eighteen conducted the Richard Williams Junior Singers in the Cardigan Semi-National Eisteddfod. It was a proud moment when the choir won both the Under Sixteen and Under Twelve competitions under her baton. For over fifteen years Margaret assisted with the conducting duties of the Tonyrefail Children's Choir, leading them in both concerts and overseas tours to France, the Czech Republic and Holland; she combined her choral involvement with a career at Cwmlai Primary School where Margaret was a hugely popular and successful teacher. 

Since the passing of their founder and Musical Director in December 2007 Margaret has taken over the conducting role of the Richard Williams Singers. With her considerable performing experience both in this country and abroad, Margaret is highly respected by all the choristers, especially as she has maintained her father's insistence on the highest choral standards. Also reminiscent of Richard's legacy is Margaret's ability to produce choral arrangements matched uniquely to the choristers and the sound they've produced for over five decades.