Hi Geoff,
it certainly looks as if 263 could be the property we're looking for. Having searched for Beechams', I've come across Herbert Beecham, born in 1884 in Boston. In 1891, he lived at 17, Clayton Street, Grimsby, and in 1901 his residence was 195, Willingham Street, Grimsby. Haven't checked 1911 yet.
Only thing I'm not convinced about is his age. If born in 1884, he would have been approx. 46 years old in the photograph. I have to say he looks quite a bit older than that! Will continue to search.
Thanks for your help,
Mike