A year later, and I can simplify my choices:-
National chains are great, eg. Wetherspoons, Zizzi`s, Carlucio`s, Cote Brasserie, Pizza Express, Pizza Hut, MacDonalds. For us this means a short bus ride to Brighton.
Locally in Shoreham-By-Sea we like Chambers, Toscas, Indian Cottage Tandoori,; in Worthing it`s Food, Thai Street Food, and Indigo.
Whilst there is greater availability, my stomach has decided wine is better than beer and no ice cream, for the moment.