Plumbs the butcher, Hornsey Road, reveal of older sign

The W. Plumb shopfront earlier this year. 

Last week, whilst heading up to Crouch End on a 91 bus, I noticed an old wooden sign had been revealed at 493 Hornsey Rd. This used to be W. Plumb butchers and the shop inside is a tiled gem, see here.
I went back later to investigate...

Note the 1950s yellow tiles have been replaced

A. Hancock,  No.11 [presumably] Hornsey Rise

As I was taking snaps of the shopfront a fella came along with a cute young Bedlington Terrier and, well, blow me down, he stuck a key in the front door and it turns out he lives there with his partner. I didn't chat for long but it seems this old hand-painted sign will now stay visible.
I am note sure when A. Hancock was at the site as I don't have a County Suburbs Directory for that era as pre-1930s (approx), this was then part of 'outer' London. I can't therefore ascertain if the tilework inside and the coloured glass in the windows are concurrent with Mr Hancock's era, or what years he was there.
My 1939 directory tells me Thomas Knowlden, butcher, was there in 1939. I am not sure when Mr Plumb took over the business, though, as above, the yellow tiles and shop sign hint at the 1950s and they were still selling meat products under that name in 1990 when I used to shop there.
I think I need to go back and knock on the door for another chat. I will, hopefully, have an update soon.