Hi having a querie relating to alarms. A commercial premises has an 8 zoned alarm panel,multiple manual call points and linked heat and smoke detectors. This system appears to me to be a part 1 but the last engineers report states Part 6. Any help would be appreciated 

Sounds like a typo error or the engineer doesn't know what he is talking about, part 6 should only apply to residential premises.

There are some poor quality contractors servicing fire alarms, I've seen the incorrect use of Part 6 paperwork with some general electricians who think because they've stuck a few domestic smokes in houses that they are experts in commercial fire alarm systems.

If they can't use the correct paperwork they shouldn't be doing the work and I always advise in cases like this the contractor is replaced.