Thanks for the comments people, below is a list of what was on the failure sheet;

Its all on the refusal certificate I have no graphs or anything they haven’t given me them

Exhaust emissions carbon monoxide content after 2nd fast idle excessive (7.3.2b)

Exhaust emissions hydrocarbon content after 2nd fast idle excessive

Exhaust emissions lambda reading after 2nd fast idle outside specified limits

Exhaust emissions carbon monoxide content at idle excessive

So they basically told me head gasket had gone but then it changed to the engine block had cracked etc

Any help would be greatly appricated

Thanks again