In 1947 she married again: presumably there was a prior divorce:

The number of different names between them must have been a tad confusing for the registrar:

Surname First name(s) Spouse District Vol Page
Marriages Mar 1947   (>99%)
Brandon Robert B Longbotham Chelsea 5c 606
Brandon Robert B Ritchie Chelsea 5c 606
Braun Robert B Longbotham Chelsea 5c 606
Braun Robert B Ritchie Chelsea 5c 606
Longbotham Thyrza J Brandon Chelsea 5c 606
Longbotham Thyrza J Braun Chelsea 5c 606
RITCHIE Thyrza J Brandon Chelsea 5c 606
RITCHIE Thyrza J Braun Chelsea 5c 606

The question is whether she then used Brandon or Braun for her surname.  No death found under either surname up to 2006.
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Though there are three “Thyrza J” deaths on record on FindMyPast from 1947 (when she was on record as alive) to 2006 (the end of BMD records currently):

Last name First name Born Died Event Location   
ILLINGWORTH THYRZA J 1917 1947 1947   Worthing, Sussex
SOMERSET THYRZA J 1917 1966 1966 Seisdon, Staffordshire
SPENS THYRZA JOSEPHINE 1912 2000 2000 Eastbourne, Sussex
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Their marriage registration date:

First name(s) GEOFFREY J
Last name LONGBOTHAM
Marriage quarter 2
Marriage year 1935
Registration month -
MarriageFinder™ GEOFFREY J LONGBOTHAM married
THYRZA J RITCHIE
Spouse's last name RITCHIE
District DARLINGTON
District number -
County Durham
Country England
Volume 10A
Page 34
Record set England & Wales marriages 1837-2008
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