Cover
Five classes, and the clause that decides each one
Every class below is placed with named insurers. The second column is the part that decides what you actually recover, and it is the part a comparison quote never mentions.
Property
Buildings, tenant improvements, contents, stock and rent receivable.
Where it goes wrong
Sums insured drift. Index linking tracks a general index, not your building, and a figure set four years ago is routinely 20 to 30% light today.
Fleet
Owned vehicles, grey fleet, hired-in plant and goods in transit.
Where it goes wrong
Grey fleet is almost always larger than the owned fleet and almost never recorded. The exposure is the licence and business-use check nobody ran.
Liability
Public, products and employers liability, and the contractual limits your customers demand.
Where it goes wrong
Limits get set by whatever a procurement form asked for once. A catastrophic injury claim can exceed five million before defence costs.
Cyber
Incident response, business interruption, data restoration and extortion.
Where it goes wrong
The limit matters least. What matters is who answers the incident line, and whether unsupported software voids the whole thing.
Business interruption
Gross profit while you recover, plus supplier and customer extensions.
Where it goes wrong
Twelve months is the pre-printed default. It has to cover making safe, adjusters, planning, rebuild, refit and winning customers back.
Property, worked through
Test the average clause against your own figures
This is the same calculator that sits on the home page, with a realistic excess applied. Change any field and the scenario table underneath re-runs at five claim sizes.
Your property, your numbers
Underinsurance does not reduce your cover by the shortfall. It reduces every claim by the same proportion, however small the claim.
Underinsured by 29%, so every claim is reduced by the same proportion, however small.
£43,750 of that is the average deduction, which no policy summary shows you. £2,500 is the excess you already agreed.