Is this her birth registration?
March qtr 1949
Chatham district vol 5b, page 481
Dansie, Mother's Maiden Name: McDormott
Probable parent's marriage:
June qtr 1947
Chatham district vol 5b, page 843
Dansie, Charles R W
McDermott, Mona M
Father's birth?
December qtr 1921
Medway district vol 2a, page 1280
Dansie, Charles R W Mother's Maiden Name: Smith
And, probable parent's marriage for Charles?
September qtr 1920
Medway district vol 2a, page 2069
Dansir, Charles
Smith, Irene A
All info from FreeBMD
Best to confirm theses findings by purchasing marriage and/or birth certificates?