Blanket motor insurance policy

A motor policy describing the vehicles in general terms rather than specifying them individually. The policy usually refers to any motor vehicle, details of which have been notified to the insurer. When a change of vehicles takes place the substitution does not have to be endorsed on the policy. The Motor Insurance Database does not preclude blanket policies or certificates, but for tracing purposes, under the European Directive, the policyholder must maintain a record of vehicles.

Blanket rate

See: Average Rate Insurance.
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Uniform property Insurance premium rate applied to coverage at multiple locations or to insured under a blanket Policy as a substitute for specific rates for each location or type of property.

Blast furnace clause

A liability insurance restrictive endorsement excluding work on blast furnaces. The clause is equally a gasometer clause, or a towers clause, given the other buildings (hangars, steeples, bridges, viaducts and roofs other than private dwellings and/or shops of not more than three floors) also named. They all call for close scrutiny from the underwriter because of their height or other physical characteristics.

Blended covers/integrated covers

The combining of conventional insurance with financial losses in a single programme, as in multi-line insurance. Risks can be priced on a portfolio basis – and therefore cover may be available for risks that, in isolation, would be too costly to insure. The financial losses are based on falls in a specified index and not the actual portfolio.

Block limit

The limit used by a property insurer to put a ceiling on the maximum amount of business he will write in respect of any one block of buildings.
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The maximum value that an insurer will cover in respect of a given city block.

Blue Book

Published by Lloyd’s Aviation as Lloyd’s Confidential Record of Civil Aviation. It lists owners of aircraft and gives fleet details, accident history and other information of value to underwriters and others.