It looks like that there are some errors in the transcription done at TNA in series WO 409 (Durham Home Guard records). an example is
WO 409/27/23/55: 1940-1945: John Ambelez - born 24/08/1923 [there is no birth entry in ancestry but it may be Juan Ambelez who was registered in the October-December quarter of 1923 in the South Shields Registration District], South Shields - Durham Home Guard, 8th Battalion (the file is to be opened in the next few days). There are also the cases of WO 409/27/45/482: 1940-1945: Norman Punshon - born 25/08/1923 [no entry on ancestry] - Durham Home Guard, 13th Battalion (to be opened at end of August 2023) and WO 409/27/45/483: 1940-1945: Thomas Punshon - born 25/08/1923 [no entry on ancestry] - Durham Home Guard, 13th Battalion (to be opened at end of August 2023), they may be twins born outside England and Wales of course.
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