An exchange is "set" as accepting orders for fibre broadband when:
A) the exhange has been fibre upgraded
B) a number of PCPs (street telephone cabs) have been linked and installed with a FTTC DSLAM cabinet and ready for commission.
The number of initial FTTC DSLAM cabinets in an exchange are to be ready for commission before an exchange area is decleared as Accepting Orders for FTTC fibre broadband is usually around 10 though this can change.
Though the initial number of FTTC Dslam cabs needed to declare the exchange as Accepting Orders for FTTC broadband isn't really that important.
However initially not all the PCPs (cabs) in the exchange are will be installed and connected to a FTTC DSLAM cabinet meaning not everyone will get fibre broadband in the exchange area at the same time.
More and more PCPs will be linked and installed with a FTTC Dslam cabinet over time either under the Superfast-Openreach Commercial fibre rollout scheme (if they finicially and commercial meet the criteria) (Bear in mind that the commercial fibre rollout plan is almost at it's end) or under the your BDUK fibre rollout plan ( in your case the Better Broadband to Suffolk BDUK scheme) if your area is within and in scope of the your BDUK scheme
The BDUK schemes around the UK have been allocated a amount of public money to increase the rollout of fibre broadband on top of the Commercial Openreach fibre broadband rollout. The amount of public money and percentage of coverage in the BDUK area differs from each BDUK scheme.
Now to see if your cabinet is going to be installed with a FTTC DSLAM cabinet and too see if your property is under a NGA/NGB area you need to ask NGA Openreach or your BDUK scheme ( Better Broadband Suffolk). Details on how to contact them and what info they need has already been given to you.
As someone else has pointed out the number of cabinets on my local exchange may be less than 10?
Yes but why is it that nobody can give me an answer, the rollout has been ongoing for a couple of years. Why is it so difficult to find out what is going on? The process should be simple instead of vague. Why is it so hard to find out information that should be freely available?
The number of cabinets in your eachange area isn't really important.
I think the important question you want to find out is IF and When your cabinet (which you have said is PCP1) will be installed with a FTTC Dslam cabinet in order to have FTTC fibre broadband available to you?
For this you need to contact NGA Openreach and/or Your BDUK scheme ( in your case Better Broadband to Suffolk). All the details in how and what to include has already been given to you.