Good Spot Ladyhawk 
Also Sarah Ann Kerr is Beatrice's sister, who is married to Harry Kerr.
JJ
Good spot too JJ had forgotten I'd posted that marriage info. (reply #25), all coming together now
I can't find a baptism for Beatrice Selina Biggs

possible birth entry although doesn't tie up with birth date
29 Jan 1906 given on death Beatrice Selina Callaghan

Name: Beatrice Biggs Mar
1905 Poplar vol 1c page 519
Looking back over all the info. this seems to be the family
Henry Richard Biggs b1870 Rotherhithe =
Eliza Ann Jones b1873
Sarah Hannah 1897 = Harry Martin Kerr
Harriet Mary 1898
died Dec 1898 St Olave age 0
Thomas Philip 1900 = Ethel Lock
Henry Richard 1902
died age 2 Dec 1904 St Olave
John Edward 1904
died Sep 1906 St Olave age 1
Beatrice Selina 1906 = John B Callaghan
Alice Rebecca 1909 = 1939 Lewisham on Electoral Reg. as Alice Rebecca Carr
living Hilton House St Norbert Rd Lewisham Alice R Carr died age 42 (1909) Lewisham Mar 1941
their daughter mmn Biggs born 1940 Lewisham
possible death entries for Henry Richard & Eliza Biggs
Henry R Biggs Sep 1919 Southwark died age 50 (1869)
Eliza Biggs Sep 1913 St Olave died age 42 (1871)
Edited/added Electoral Register
1906 Rotherhithe Southwark
2 Elizabeth Place (living here 1904 address of son John Edward's bapt)
Henry Richard Biggs1907 Rotherhithe Southwark
8 Braddon Street
Henry Richard Biggs1913 Rotherhithe Southwark
12 Debnams Road (dwelling house)
Henry Richard Biggs 1914/1915 Rotherhithe
35 Wolseley Buildings (dwelling house)
Henry Richard Biggs
1923 Bermondsey Electoral Register
51 Swan Lane Rotherhithe
Ethel Biggs
Tom Philip BiggsFred Larkin
Frederick Valentine Larkin married 1922 Annie A Kelly
Alice Spokes
1931 same address addition Annie Alexander Larkin, Edwin Larkin, John David Larkin,
George Spokes
1930 same address addition Ellen Spokes
Thomas Philip Biggs married Ethel 1922 St Olave he died Jun qtr. 1941 Lewisham age 40