Would it be easier to take it to another garage? As others have pointed out, you still have another immobilisation device fitted. I don't know anyone who would fail your car for that, I certainly wouldn't.
Save your money. It's a 51 plate Vauxhall Corsa. Fitted as standard. Can't think of any Vauxhalls produced since the 1970s that haven't had a column lock.
My drivers s side rear one is cracked. Is that offside or nearside? Sorry
It depends on whether your car is LHD or RHD, that's why we use the offside/nearside system - you can't get it wrong. It's worth learning which is which.