A warranty is a minor term which is ancillary to a condition. Due to it's lesser significance, there are fewer remedies available for a breach. One has the right to sue for damages only, termination of contract is not permitted. In regards to an insurance contract however, if it is listed as a warranty it is considered a major term due to the nature of the contract. Therefore, more akin to a condition.
The case of Bettini v Gye (1876) 1 QBD 183 provides an outline for the use of a warranty. Bettini, an opera singer, was engaged by Gye to appear in a season of concerts. He undertook to be in London at least six days before the first concert for the purpose of rehearsals. He arrived three days late because of a temporary illness. He gave no advance notice and Gye refused to accept his services.
It was held that the plaintiff had been engaged to perform for a 15-week season and the failure to attend rehearsals could only affect a small part of this period. The promise to appear for rehearsals was a less important term of the contract. The defendant could claim compensation for a breach of warranty but he could not repudiate Bettini's contract.