savings can be made with controls, and if you are going to change the boiler it is pointless not to do them as well...cases of up grading from on-off controls to compensation controls on condensing boilers have shown savings of 10-15%.
Of course we are talking about energy saving something very difficult to measure as there are a vast amounts of variables.
Perhaps I should have a word with the baker, and fit OT in January to see how much additional savings I make in 2012.