Her birth:

Surname First name(s) District Vol Page
Births Mar 1908   (>99%)
Collins Dorothy Louise C Islington 1b 220

(TFPL, 2020) And in the new GRO index with mother’s maiden name:

Name:                             Mother's Maiden Surname:
COLLINS, DOROTHY LOUISE CECILE    BINAEPFEL  
GRO Reference: 1908  M Quarter in ISLINGTON  Volume 01B  Page 220
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In 1931 there was a marriage that might have been hers:

Surname First name(s) Spouse District Vol Page
Marriages Jun 1931
Collins Dorothy L C Cutting Edmonton 3a 1883   
Cutting Basil W A Collins Edmonton 3a 1883   
Payne Herbert E Thomas Edmonton 3a 1883   
Thomas Winifred D Payne Edmonton 3a 1883
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There were these subsequent births:

Surname   First name(s)   Mother   District     Vol  Page
Births Sep 1932   (94%)
Cutting   Jean R          Collins  Yarmouth     4b   17
Births Dec 1934   (>99%)
Cutting   Ann             Collins  Edmonton     3a   1140

Or these:

Surname First name(s) Mother District Vol Page
Births Jun 1931   (>99%)
Payne Jack Collins Bradford 9b 179   
Births Dec 1931   (>99%)
Payne Daphne P Collins Birmingham S. 6d 32
Births Mar 1932   (91%)
Payne Margaret D Collins Eastry 2a 1750   
Births Dec 1932   (88%)
Payne Jenny Collins Hartlepool 10a 184   
Births Mar 1934   (>99%)
Payne David K Collins Eastry 2a 1744   
Births Sep 1934   (>99%)
Payne Veronica A Collins Hartlepool 10a 217   
Births Dec 1934   (>99%)
PAYNE Brenda J Collins Solihull 6d 1095   
Births Mar 1935   (90%)
PAYNE Sheila L Collins Lambeth 1d 171   
Births Sep 1935   (75%)
Payne Roy Collins Lambeth 1d 244   
Births Mar 1936   (>99%)
PAYNE John E Collins Pancras 1b 191   
Births Mar 1941   (99%)
Payne Doreen E Collins Eastry 2a 3041

So I cannot tell from the above whether she married a Payne or a Collins.  But a birth certificate would soon sort this out.
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