She is shown on the Birth at Sea Register:

First name(s) Mary Emily Martin
Last name Angel
Birth year 1901
Birth date 14 Apr 1901
Reported date Jul 1901
Vessel name Torrens
Father's first name(s) Falkland
Father's last name Angel
Mother's first name(s) Annie Rosa
Mother's last name Martin
Archive Reference BT 334
Box 0004
Page 132
Record set Births at sea, 1854-1960
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And there was this registration in Fulham:

Surname   First name(s)      District   Vol  Page
Births Sep 1901   (>99%)
ANGEL Mary Susan M Fulham 1a 215
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In 1911 census known as ‘Mary Emily Martin Angel’ and born at sea.

A possible marriage found on Find My Past:

Surname   First name(s)   Spouse   District   Vol  Page
Marriages Jun 1921   (>99%)
Angel Mary S M Ball Hammersmith 1a 529
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Any of these could be their children:

Surname   First name(s)   Mother   District   Vol  Page
Births Mar 1922   (>99%)
Ball John W Angel Hammersmith 1a 304
Births Dec 1923   (>99%)
Ball Irene F Angel Walsall 6b 1248
Births Mar 1926   (>99%)
Ball Violet M Angel Lichfield 6b 704
Births Jun 1930   (>99%)
Ball Edna M Angel Lichfield 6b 681
Births Dec 1930   (>99%)
Ball Iris M L Angel W.Ham 4a 497

I think one or two marriage and birth certificagtes are needed here.

Find My Past gives the same set for the same criteria:

Last name  First name  Born  Died  Event  Location   
BALL JOHN W    1922  —  1922  Hammersmith, London
BALL IRENE F   1923  —  1923  Walsall, Staffordshire
BALL VIOLET M  1926  —  1926  Lichfield, Staffordshire
BALL EDNA M    1930  —  1930  Lichfield, Staffordshire
BALL IRIS M L  1930  —  1930  West Ham, Essex
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Their marriage index:

Surname   First name(s)   Spouse   District   Vol  Page
Marriages Jun 1921   (>99%)
Angel Mary S M Ball Hammersmith 1a 529
Ball John T Angel Hammersmith 1a 529
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