Most impressed to find a song lyric that mentions Arding & Hobbs!
My affection for that Grace Bros anachronism of a retail emporium comes mainly from it featuring in Michael De Larabietti's '70s trilogy of supposed kids' books, The Borribles, where it's recast as Harding & Nobbs. Also, it gets blown up by a terorist in some late '70s film called NightHawks, starring Sylvester Stallone. I shit ye not.
Of course, they've re-'branded' it now as Allders and got rid of the neon lettering, formerly a local landmark, particularly as one looked down Lavender Hill. Sods.