The whole of Europe is in the middle of a scorching heatwave. Here in the Cotswolds the grass is as brown as a hay bale and the thermometer has been touching 30°C. Meanwhile, colleagues in Geneva have complained of temperatures approaching a scarcely bearable 38°C.

For Edita, none of this is extreme. She is currently working in Haiti, where these temperatures are on the moderate side. She was home for ten days of R&R, and it seemed like a good time to go hill walking. We decided to head for the ...