I looked for any Charles Barker born between 1891-1900 in the area in/around Barnet and the only likely one is the one already mentioned who was born Charles John Barker Sept.qtr.1898 Hertford - mmn Wren.
1901 census shows his actual birthplace was Potters Bar and family living in South Mimms.
Marriage certificate shows Charles John Barker 25 of Potters Bar - Ironmonger (I think, hard to read), son of James Frederick Ashby Barker, Builder (retired) and Maria Kydd Barker, nee Wren married Agnes Cargill Orr 21, dau. of David Marshall Orr, General Labourer, and Annie Orr nee Swankie married 13/3/1924 Arbroath. Agnes was born, as already stated, in 1903 but her parents didn't actually marry until 1907.
This must surely be the right Charles Barker but the surname Spink doesn't feature in Agnes' names at all - born Agnes Cargill Orr 1903 Arbroath and mmn Swankie.
Annette