Budget Insurance is a broker owned by BGL Group, which also owns the Compare The Market comparison site and Beagle Street (which specialises in providing life insurance products).
When you approach Budget for a quote, it will pass your details to its panel of insurers. One of these companies will then act as underwriter for any policy taken out via Budget.
This means that two different people insuring their vehicles with Budget will not necessarily have their policies underwritten by the same company.
Budget focuses on providing car, van and home insurance.