I had a look through Ancestry and couldn't find anything, so went to births on Find my Past, guessing she was born in 1910. I worked through all the quarters up to the middle of 1914, then back from 1909 to 1905 and then on from 1914 and found that she really was a young bride:
Lewthwaite, Gladys, mother's maiden name Weedon, Prestwich 8d 595 - 2nd quarter 1915! Perhaps she was already pregnant and a birth was recorded later that year?
Janet.