I’ll offer merely an extract from Fauna Britannica for this post - worth reading though!
'Wasps must be the most misunderstood and unjustifiably maligned of common British insects. They can be undeniably troublesome in late summer, when the workers have finished looking after the young and are attracted by ripening fruit - and are pursued with rolled-up newspapers in consequence. This is understandable but they should not be destroyed unless their nests are very close to habitations where they might come in contact with very young or very old people, or people who are allergic to their stings. It is not generally realised that, whereas bees feed their young on pollen and nectar, wasps feed their young on animal matter, including a great many insect pests. As a result, their role as biological control agents is largely unappreciated. One family of wasps has a more dubious benefit, however, in feeding solely on other valuable creatures; they are known, with good reason, as the spider-hunting wasps (Family Pompiidae).'