In the United Kingdom, there are around 270 species of bees. This includes both native and non-native species. The bee species in the UK exhibit a diverse range of sizes, colors, and behaviors. It's worth noting that the number might be subject to updates as scientific research and monitoring efforts continue. For the latest and most accurate information, it is advisable to consult official sources related to bee biodiversity in the UK, such as those maintained by entomological organizations or conservation groups.