@farrellsarah6
Key words highlighted from the quoted text at #4 for clarity, to see how they match with your circumstances.
"At the point of ordering ..." is the time when VM must declare if the date is 'provisional' and inform the customer.
From the OFCOM document at para 9 "the date initially confirmed in writing "
VM retrospectively trying to re-engineer the original confirmed installation date as a 'provisional' one (further into the attempted installation) was found to be a non-starter in the adjudication linked below from CISAS where the customer was awarded £398.98 for VM's errors and incorrect calculation of automatic compensation (based on the incorrect representation that the customer's installation date was a 'provisional' installation date).
https://community.virginmedia.com/t5/QuickStart-set-up-and/Compensation-awarded-by-CISAS-after-faile...
The information at #4 about delays due to construction works not being covered is not clear enough. Refer to para 40 of the OFCOM doc for the limited circumstances when VM can reduce any payments due. If the construction delays are due to VM's sub-contractors, VM is still responsible.
If a delay is due to a third party (such as landlord delaying a wayleave agreement being processed or a council processing a permit to work in the street) then payment may be reduced by an amount relating only to the delay caused by the third party.
You will find past topics on here where the blanket 'waiting for council permits' excuse has been put forward by VM, only for the customer to make their own enquires with the council and find that no permits have been applied for. That has happened several times recently. Here is an example
https://community.virginmedia.com/t5/QuickStart-set-up-and/Installation-delays-because-of-fake-permi...
Only you will know the exact circumstances and details of your VM installation. The exact details are important in processing any claim under the automatic compensation scheme. Once you have gone through the compensation scheme in detail yourself, and worked out what you think you are due in relation to your own specific situation, use that as the basis for processing any complaint to VM (and beyond if necessary).