Hi
I don't know what you have found census wise, so apologies if you already have this.
Looking at the 1901 census, there is some confusion transcribing the handwritten entry, so transcription offers both Byron W Tanswill and Byron H Tanswell. On the written entry he appears, to me, to be a Slaters Laourer.
I wonder if those with Newspaper access might find more trying Tanswill and/or even slater in the search parameters.
In 1911 he is shown as a Coal Haulier (own account) and Byron H Tanswell