The job Centres (or whatever they call them now - probably Insignia) are a good source of information about starting up a small business and how to research and prepare a business plan. The plan has to be a good 'un to attract funding from local employment inititives, or the bank - but we all know what you think of them.
A delivery service involves the expense of a vehicle and insurance before you get any income. And cash-and-carry means exactly that. No credit. Have a chat with 'em, they have access to a great deal of advice.
I forgive you for not delivering across the water. If you did, that varmint Banjo-Flower would insist that you catered for his pack of vegan wolverines and his lizards with irritable bowel syndrome. And this would drive you nuts.