Plants are essential to everyone's lives. Welcome to Plantlife.
Is it illegal to pick common wildflowers in the countryside?
It is not normally an offence to pick the 'Four Fs' – fruit, foliage, fungi or flowers – if the plants are growing wild and it is for your personal use and not for sale. Many rare or endangered plants – such as adder's tongue and lady's slipper orchid - are protected under the 1981 Wildlife and Countryside Act, so picking these is against the law (although, being rare and endangered, you're unlikely to happen across them by accident!)
Picking a flower is one thing. Uprooting it entirely is another. The law strictly prohibits removing a plant from the wild and you could risk arrest for doing so.
Make sure also that the flowers you are picking are in a wild location and not on council or otherwise protected land. Any flowers growing in, for example, council parks, town or village displays, roundabouts or roadside verges are off limits as are those in nature reserves and community gardens.