Ext advertising are experts in guerrilla marketing/advertising of all kinds we also rent out billboard space and other types of marketing and advertising strategies.we can market or advertise you company on a budget to suit your company, whether you are one of our multi-million pound companies or just a small company.why do businesses use Ext advertising ???? A company comes to us for a hard hitting impact type of marketing or advertising what will generate a lot of interest or attention.We have a wide range of marketing and advertising strategies from guerrilla, billboards, computerized signs, plan and prepare the clients market and sales strategy.businesses use Ext advertising to get results !!!