You can also tell they are superimposed, because th real Manchester trams are 3 car sets i.e. a driving car at either end and a passenger car in the centre. On Corrie they just use the 2 end cars. I will now remove my anorak!!
Where do you get your '3-car-set' info from, sddsddean? I live in Manchester and I don't think I've ever travelled on, or even seen a '3-car-set'. The most common trams, as far as I'm aware, consist of two cars. I'm not saying you're wrong, I'm just wondering where you've seen one.