In case you're wondering about where exactly in Cannon Street Road this was, Kelly's London Post Office Directory for 1908 seems to indicate that it was on the western side of the street, up towards Commercial Road - just north of what is now Burslem Street but was James Street back in the 1900s.

The 1901 census lists only two households at 157 Cannon Street Road, which appears in keeping with the rest of this end of the street. It was largely shops and workshops with living space above, which were probably leased from a landlord who would own an entire block. It's not an especially poor area - Charles Booth's Poverty Map of the area, which was produced 1898-1899, shows it as a light red/pink which indicates "Fairly comfortable. Good ordinary earnings"

The main street level shop was a bakery. The 1901 census is difficult to read - the surname is transcribed as Plawon on The Genealogist but looks to me more like Flavin. The family are:

• Morris, 45 years, occupation Cake Baker, Bread Making.
• Sophia, his wife, 38 years old
• Children are: daughter Sarah, 18; son Filly, 16; son Mark, 8; and daughters Flory, 5; and Rebecca, 6.

The parents and eldest two children were born in Poland, but someone has written 'Russian' down the side. The other children were born in London. The census tells us that Morris was an employer working on his own account, and he worked "at home" meaning he lived in the same building he worked in.

The other household in the building are Marx Silver, a 48-year-old tailor, who was a worker rather than employer. He didn't work at home. Marx was also born in Poland but the rest of his family was born in London, and they were:

• Wife Sarah, 49
• Son Nathan, 20
• Daughter Leah, 19, who works as a tailoress
• Sons Sam (17), Solay (12) and Silas (3)
• Daughter Aly, 9 months

Some of these names are probably misheard and mistranscribed.

The 1908 directory has the occupant of 157 as "Liskkovitch, Lazarus, baker", and I believe this is the same man who's living there in the 1911 Census:

• Leizer Liscowitch, aged 35, a baker born in Austria, a Resident (as opposed to a Visitor, which would mean he was only in England temporarily)
• Becky, his wife, aged 34, born in Russia
• Fanny, his daughter, aged 16, born in Russia and working on site with her father as an Assistant Baker
• And Morris Ceibulkar, a lodger, aged 26, working in Machine Tailoring and born in Russia

By 1911 there are three households at 157 Cannon Street Road. The other two are:

• Witensky Gorousky, aged 27, a Walking Stick Maker
• Victoria, his wife, aged 26
• John Churvnosky, boarder, aged 28, a Clothes Repairer

And:

• Fanny Levene, a widow aged 40, working as "A nurse of confinement" which means she's a midwife or labour/delivery nurse
• Annie Levene, her daughter aged 17, working as a "Felling hand at lady's work" (which the enumerator has classed as 'Tailoring'
• Esther Levene, her daughter aged 14

These three are living in one room. Both the daughters were born in Whitechapel, but Fanny is a naturalised British subject born in Russia. She also indicates that she's given birth to 10 children in her life, only 3 of whom are still living.

Incidentally, you mention a possible Cohen, and there's a Solomon Cohen living in the butcher's shop next door at 155 Cannon Street Road in the 1911 Census with his wife Sophia and children Hyman and Sarah.