In the United Kingdom, there are several plants that can thrive in shady areas. Here are some of the best options:

Hosta: These attractive perennials come in a variety of colors and sizes, and are well-suited to shady areas. They have large, lush leaves that are ideal for creating a lush, green look in shady corners of your garden.

Ferns: Ferns are classic plants for shady areas, and there are many different types to choose from. From delicate maidenhair ferns to large, tropical-looking tree ferns, ferns are a versatile addition to any shady garden.

Hydrangea: These popular shrubs come in a range of sizes and colors, and are ideal for providing a burst of color in shady areas. They prefer dappled shade and can tolerate a little more sun as long as the soil remains moist.

Heuchera: Also known as coral bells, heuchera are versatile perennials that are well-suited to shady areas. They come in a range of colors, from soft greens to deep purples, and produce spikes of delicate flowers in the summer.

Foxglove: These tall, elegant perennials are a favorite of many gardeners, and are well-suited to shady areas. They produce spikes of bell-shaped flowers in shades of pink, purple, and white, and can add a touch of drama to a shady garden.

Hellebores: Hellebores are shade-loving perennials that produce beautiful, cup-shaped flowers in early spring. They come in a range of colors, from white to deep maroon, and are ideal for adding a touch of color to a shady garden.

These are just a few of the many plants that are well-suited to shady areas in the UK. When choosing plants for your garden, it's important to consider the specific conditions in your area, including the amount of shade, soil type, and moisture levels.