Declan, to add to what's been said already, beware of 'Dublin in the rare oul times' codology. Leaving aside where Temple Bar's setts came from for a moment, the No. 1 consideration for a city-centre street surface of setts* today, whether it be historic or recently relaid, is that it be a cohesive and high quality surface. The quality of the 1990s relaid sett surfaces in Temple Bar are utterly appalling. The technique used - laying the setts an inch apart then pouring tar between - is not a historic treatment. It is a poor surface to begin with - uncomfortable to cycle on or push a buggy over - then the tar wears away over time so you've got large gaps in between each stone, then it's really horrendous. This can be seen in many locations in Temple Bar - Eustace Street in particular, I think.
There was a Temple Bar Framework Plan in 2004 by architect Sean Harrington (http://www.sha.ie
) which among many other recommendations said that the sett surfaces should be relaid to achieve a tighter, improved surface. On Temple Lane, the 1990s surface had got so bad by last year that it had to be relaid. But was it done according to the recommendations of the 2004 plan? No. It was 'business as usual', with DCC's Roads Maintenance workers laying the setts with wide gaps and pouring tar in between. Why? Maybe they didn't have the money to start looking at a new technique ....... or more likely just that nobody cares.
It would be good if you could look at this issue in your film, and the fact that, for a major European city, we scandalously often don't employ conservation expertise when dealing with historic street furniture and surfaces. DCC I understand have produced a guidance manual on this topic but I have not seen it yet.
Then there's junctions. Street junctions of setts used to be a work of art. Now the setts just meet at a crude diagonal line - see any junction in Temple Bar. Many of the old ones were unecessarily destroyed in the '80s and '90s.
*Although 'cobble' is in common usage to refer to surfaces such as those of Temple Bar, I believe 'sett' is actually the technically correct term, while 'cobble' refers to the smaller circluar stones used, for eg., in the surface of the front square of Trinity College.