August Books 13) Eater of Wasps, by Trevor Baxendale
The wasps surrounded him, settling on his face and hands. He yelled and brushed them away, felt the inevitable stings on his hands and his fingers. More were flying around his head, crawling in his hair and on his neck. He stumbled over a kitchen chair and fell to his knees. The air was full of insects, his ears filled with their agitated noise. They were after him. It was deliberate. Rigby knew it.
A very effective tale of body horror here, with some similarities in central theme and historical setting to the later TV story The Unicorn and the Wasp but without the Agatha Christie bits and with more killer aliens. The Doctor is starting to behave all unsympathetically, though, and veers closer to cruelty than I would like. However the two companions, Fitz and Anji, have plenty to do and the wasps themselves are tremendously well visualised, as is the village which appears normal but is concealing horror and abomination.