Hi Genouille,
I think your request for Junette's baptism may not be readily available on-line as its too recent. You can't even search in the Government General Register Office for births after 1918.
You could try contacting the Somerset Records Office in Taunton to see if they could help.
Meanwhile, there is a baptism for a Florence Dulcie Reson 14-7-1914 (d/o Henry & Minnie Reson) that took place in Ashill Parish, Somerset.
The GRO records the mother's maiden name as "Showers" in Chard District, (Sep1/4, Vol; 05c, Page; 589)
Do you think this could be your g/mother's birth?
Have you tried the Somerset Family History Society to see if they could help?
Alan