Evidence of the offending hole is very important

The size and depth is also relative to the class of road, as is the frequency of checking required by the authority
There are national guidelines but each authority has their own set of rules both for sizing and how long they are obliged to remedy once reported
Deep delve into the local authority where the pothole was will usually show the criteria
Nearly all claims will initially be refused due to Section 58 of the Highways Act
It's a slog but was worth it in the end to me
Here is a Herefordshire plan from 2016 - If there is a newer one, I am sure they will direct you to it
https://councillors.herefordshire.gov.uk/documents/s50041112/Highway Maintenance Plan June16.pdf
Page 18 on
They even have a progress map, maybe you can see if the hole has been reported? Much better for you if it has and it's not been done within their timeframe
https://www.herefordshire.gov.uk/roads-1/pothole-road-defect-progress-map
Should you take this on and request DPA information, be very specific in what you ask. If you ask generally they will answer generally
You can ask lots of individual questions on on request
The repair logs I received 1st request looked OK, 3rd request gave much more details and showed a lax attitude by the operatives recording of road defects in question
As has been said, evidence, size matters
You will need to get 2 estimates for replacement or repair and the cost of repair will include transporting the item for repair, the whole lot. The big thing I learnt from my experience is claim so that you are not in a negative state at the conclusion, as opposed to making a few quid on the deal