I'm not even sure any UK 1.8's were SPI were they? Pretty sure the 8 valve was still MPI. Definitely not a carb though, the part number is for a 1.4.
What year is your car, is it a UK model or import, and can you add a picture of the part you need?
What year is your car, is it a UK model or import, and can you add a picture of the part you need?