I took a quick look at your tree and I see that you have Elsie's date of birth as 21 May 1906. This might be her birth index entry in that case:

Births, Apr-May-Jun 1906
Elsie Evans, Ashby Z., vol 7a, page 97

She was with her family in Shirebrook, Mansfield in the 1911 census:

EVANS Harry, Head Married M 38 1873 Coal Miner Hewer Derbyshire Donisthorpe
EVANS Rose Ellen Wife Married 15 years F 36 1875 Leicestershire Ashby
EVANS Thomas Henry Son M 13 1898 Leicestersh Ashby
EVANS Frank Son M 9 1902 South Derby Moria
EVANS Sue Daughter F 7 1904 Leicestershire Ashby
EVANS Elsie Daughter F 4 1907 Leicestershire Ashby
EVANS Bengkham Son M 2 1909 Coalville Leicestershire
EVANS Oliver Son M 2 1909 Shirebrook Derbyshire
EVANS Martha Ann Daughter F 1 1910 Shirebrook Derbyshire

Reference: RG14 PN20290 RD428 SD2 ED3 SN125
Registration District: Mansfield
Sub District: Shirebrook
Parish: Shirebrook
Address: 9 Sookholme Lane Shirebrook Near Mansfield
County: Nottinghamshire

I hope that helps. :-)

Christine