Is your product a design by legal definition?
S1(2) of the Registered Designs Act 1949 defines a design as "the appearance of the whole or part of a product resulting from the features of, in particular, the lines, contours, colours, shape, texture or materials of the product or its ornamentation".
The "product" you have designed can be anything such as an industrial or handicraft item (other than a computer program), and, in particular, can include things like packaging, get-up, graphic symbols, typographic typefaces, and parts of products intended to be assembled into a more complex product.
So registered design protects the appearance of the type of product mentioned above, e.g. a kettle, which you must show to us using good quality drawings or photographs.
Your design cannot be wording alone, (unless it has some form of artistic stylisation) or be represented by showing us architectural plans and technical drawings which obscure the true appearance of the product. Similarly, we do not want to see views of a product with diagrams trying to explain how the product works (this is more likely to be a patent).