english: Well, the thing is that, the congestion charges, they were introduced first as a trial, so they were introduced in January and then abolished again at the end of July, followed by a referendum, and then they were reintroduced again in 2007, which of course was a wonderful scientific opportunity.
non_english: Je to preto, lebo poplatky sa v januári zaviedli najskôr iba skúšobne a na konci júla sa zrušili. Nasledovalo referendum a znova sa v roku 2007 zaviedli, čo bola úžasná príležitosť pre vedu.