Authority. Our FCA Register number is 309682. Details about the extent of our regulation with the FCA is available from us on request. Essential Travel is a trading name of Holiday Extras Limited, whose registered office is: Ashford Road, Newingreen, Hythe, CT21 4JF. Essential Travel Travel Insurance is underwritten by White Horse Insurance Ireland Limited and under our contract with themwe can only provide you with information about these particular policies.