I suppose for connections maybe there might be an argument for a late flight .. but pretty much anyone wanting to just fly from London and do anything in Dublin that evening it's waaay too late (arrives in Dublin after the pubs are closed!) and the preceding flight 6 hrs earlier is a bit early without taking 1/2 day off work.

Can we not just have the ~7pm flight back .. can easily do a full days work in London and still be back in Dublin in time for a few drinks !