The spirometry is considered the definitive test for COPD, and yours does indicate mild COPD. CT scans can show things consistent with COPD, but are not considered definitive diagnostic tools. What sort of qualifications did the consultant have? If he was a pulmonologist, did you ask how he explained the spirometry results and why did he discount them completely? And if not COPD, then what? Those are certainly legitimate questions and a good pulmonologist would have had some answer for them, or should.

Rolland is right, there are many things that can cause a low spirometry result, not the least of which is your understanding of the point of the test, what you need to do to have a good result and the quality of the coaching the person who administers the test gives you. Things that seem to be very minor can make a difference: how well you're feeling, how far you had to walk to get to the test, the humidity and dew point, and certainly, any recent respiratory illness can dictate the result. A spirometry test is basically a snapshot; it's how you're doing today, knowing that tomorrow, two weeks or two months could have different results, especially if you were just recovering from a respiratory illness. If this is the first spirometry, it will be interesting to see how they change over time. Your goal is to remain stable; within six or seven points of the original percentage for FEV1.

Something simple as a a recent infection or illness can affect breathing capacity and lung function severely. The spirometry readings are primarily used to determine the extent of any lung tissue damage from smoking, but are not exclusive. Blood tests can also used to document any decreased respiratory functions. There are also environmental and genetic causes of Lung damage and these contribute to circulatory impairments as well.
At this early stage, your pulmonologist will help determine the cause(s) and degrees of any COPD or Lung fibrosis and set you up on a care plan for the longer term. This will likely include medication, dietary and mobility changes to foster improved respiratory endurance and ability during daily routines. Here are some discussion points to focus on YOUR medical history when you meet with the new Doc:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC26....
All the best.

In a spirometry test, you get three numbers usually, for the FEV1. The first is a predicted number: what you'd expect from someone with no lung disease; the second is usually called "actual", which is what you blew measured in liters and the last number is the relative number Rolland was referring to that compares what you did to the predicted number. The % is how you did compared to others your height, weight, age, sex and ethnicity. The first two numbers are in liters and they both are absolute numbers. The % is the relative number.

That said, I'd be inclined to wait to see what the pulmonologist has to say. All due respect to the cardiologist who read the CT scan; there are nuances and a lot of current research about people who may not quite test out with COPD, but who benefit from treatment that he may not be aware of.

Thank you RollandO and again Jean for takung the time to answer. Both of you have offered good advice there and support so thanks, it really helps as at the moment im feeling bit confused with it and a bit down. My mom passed away from emphsema so i do know a certain degree but that was 22 years ago now, its a bit different again when its yourself going through it too. I will certainly keep you all posted, and to be honest i am so grateful for this group as all the members here are so humble and positive, and give so much hope. Bless you.