The tyres should be fine for the car, but not for 8" wheels. 225 is ideal for 8", 215 acceptable but 205 would be a stretch. I'm not sure if 8" is too wide for the Corsa? Look at the standard fitting for the sportiest version of the vehicle and don't go much bigger than that.
We don't get many Corsa Utility's on here. There is only one in the UK as far as I know?
Some people are using 8" wide rims on their Corsa C's with stretched tyres, OK if you like that kind of thing I guess. The law in the UK is getting tighter on that though.