Hi Gillian

Google "Lawsons BMD Micro Site" first available should be the one you want , then click on "Link to Lawsons BMD"
Found a birth on Manxbmd in year 1915 of Thomas Phillip Collister in Arbory. One assumes this would be child of Thomas and Kate Callow, no other obvious birth 1912-28.
Spent some time on "Annies" there are 68 in total on Manxbmd for 1904, by eliminating names like :Edith Annie" checking IGI to confirm parents , finding them elsewhere on 1911 census and deaths on IGI and Lawsons , only one left is Ann Jane Christian Wilson , and if this is her with Elizabeth Corrin census 1911 as Ann Jane , then surely this must be her birth. I think both J.C. and Frances suggested this. Did Francis suggest getting this birth certificate ? Not sure and too many posts to read them all again.
On the IGI there is a Thomas Wilson born 24/7/1884 to John Wilson and Ann Jane Sayle, Peel ...........Ann Jane..............interesting ??

Cheers
David