VW UP 1.0L 2012 - VW UP 1.0 2012 Turns Over But Won't Start - Dilligaf76

I friend of mine has got this car which was working perfectly fine until they decided to remove the dash and add aftermarket lights and switches by splicing into the wires.
Since putting everything back it won't start. It turns over but it seems there is no spark to the plugs.
What on earth could they have done to cause this?

VW UP 1.0L 2012 - VW UP 1.0 2012 Turns Over But Won't Start - elekie&a/c doctor
Doesn’t sound good to me . The dash pod is part of the immobiliser network, so I guess something here has been damaged .