This is what its like at the moment. See image below.
I actually ended up in this chat as a result of reading an article about Rod Stewart (musician) in a recent model railway mag, visiting this model railway shop in his youth.
I currently live round the corner on Pentonville Road and know the building/ shop well, as I was the architect who was involved in converting the empty / derelict shops along Yorkway and the theatre behind into the current restaurant with Studios above and Office behind. That was around 2007-2008. A particular street view you can see the construction work happening.
During Strip Out/ Demolition there were no clues that the previous use was a model shop.