http://www.forum.forest-of-dean.net/index.php?id=20561

I think this is in your tree, but the Edith info is suspect - I'm struggling to find that marriage in BMD's

Ellen Morgan
http://www.forum.forest-of-dean.net/index.php?id=28973

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1911
NICHOLLS WILLIAM JOHN M 1887 24 Westbury on Severn Gloucestershire
NICHOLLS MARY JANE F 1887 24 Westbury on Severn Gloucestershire
NICHOLLS EDITH ELEANOR F 1909 2 Westbury on Severn Gloucestershire

I had a suspicion that non conformist roots were involved - thats why the transcribed PR's appear to miss your folks.

Marriage 1908
NICHOLLS William John
MEREDITH Mary Jane
Forest of Dean Cinderford Baptist Chapel
1908 1 19

marriage 1881
NICHOLLS William
MORGAN Ellen
Forest of Dean Westbury-on-Severn (FoD) Register Office
1881 6 195