Here are some examples of flowering plants that are good for pollinators in April in the UK and why:

1. Bluebells (Hyacinthoides non-scripta): Bluebells produce clusters of blue flowers in the spring and are an important source of nectar for bees and other pollinators. They are also an iconic British wildflower and can provide a beautiful display in woodland areas.
2. Forget-me-nots (Myosotis): Forget-me-nots produce clusters of small blue or pink flowers that are attractive to bees and butterflies. They are easy to grow and can provide a splash of colour in borders or rock gardens.
3. Hellebores (Helleborus): Hellebores produce a range of coloured flowers, including white, pink, and purple. They are an important source of nectar for early-emerging bees and can also provide shelter for insects during the colder months.
4. Primroses (Primula vulgaris): Primroses produce clusters of small flowers in a range of colours, including yellow, pink, and purple. They are an important source of nectar for early-emerging pollinators and can also provide food for butterflies and moths.

These are just a few examples of the many flowering plants that can be good for pollinators in April in the UK. It’s important to provide a variety of plants that bloom at different times throughout the year to ensure a continuous food source for pollinators.