Hi Nooshie,
There are four names on page 608 of volume 2c of the marriage index for October 1908 and based on this, Arthur Burnett FLATMAN could have married either Daisy May NEAL or Lucy Ellen S SLADE.
I had a look at the FreeBMD birth index for FLATMANs born in Newbury after 1908 but I found nothing. Looking up the surname of the other man on the page (Albert John GORE), I found a series of births for GORE from Newbury including Albert born 1909 and the 3 registered after 1911 (when the mother's maiden name first appeared in the index) have the mother's maiden name as SLADE.
By a process of elimination, I think it's likely that Arthur Burnett FLATMAN married Daisy May NEAL.
Regards,
Al