Lawyers claim Eman el-Shazly, from Birmingham, was detained in effort to silence her sister, a critic of Sisi regime

The UK Foreign Office has been asked to intervene to secure the release of a British-Egyptian woman who it is claimed has been arrested in Cairo because of her sister’s political activism.

Eman el-Shazly, a 45-year-old based in Birmingham, was arrested on 16 August while visiting Egypt. Her lawyers say she has been detained in an attempt to silence her sister Mona, a relentless and harsh critic of the Egyptian government on her UK-based YouTube channel.

The Marches, Shropshire: For this hoverfly, pretending to be far more dangerous than it actually is has been a useful evolutionary technique

Back in the analogue world – where “analogue” means signals transmitted by continuous waves of sound or light, but also means something that looks like something else – intelligence is more poetic and weirder than its shambling digital doppelganger.

In a bend of the heatwave, a remarkable fly lands on a rose leaf in full sun. The hornet mimic hoverfly, Volucella zonaria, is a stonking great (for a hoverfly) 2cm-long creature with a peachy-yellow and black striped abdomen. It has no sting, a chestnut thorax and a big-eyed head with a pad for nectar, not jaws for chomping insects, two rather than four cellophane wings folded at rest, and an aura to unnerve the uninitiated.