Is changing a Vauxhall Corsa (2008) exhaust difficult? 

Changing the middle section pipe up to Catalytic converter on a 2008 (same with all up to 2014) Vauxhall (or Opel) Corsa petrol 1.2
You don't need anything special to do this, a few spanners, some exhaust paste and a replacement exhaust, look on ebay and you'll find the right exhaust for your Corsa. Oh, and a hammer, you always need a hammer!
This is the same on practically any car! If you have ramps it makes access much easier to get underneath, otherwise just follow what I do in this video and it should be easy!