As temperatures soar across the UK, chill your space – and avoid energy-guzzling aircon – with our pick of the best fans, from tower to desk to bladeless• The best portable neck and handheld fansOur world is getting hotter. Summer heatwaves are so frequent, they’re stretching the bounds of what we think of as summer. Hot-and-bothered home working and sweaty, sleepless nights are now alarmingly common.Get a good fan a