This is Hak's Barbers, 153 High Street, Beckenham... If I had any hair left I would definitely have it cut here ;)
The clock face on the building has the words: Gillett Bland and Co.
In 1877 Arthur Johnston bought a partnership in the Croydon clock making company Gillet & Bland, changing the name to Gillett Bland & Co. After Bland died in 1884 the company became Gillett & Johnston - as it known today.
And if you need a hair cut: http://www.haksbarbers.com