There are two main types of smoke alarm tech, says Raman Chagger, principal consultant at BRE, the Building Research Establishment. Ionisation-based systems use a tiny amount of radioactive material to charge, or ionise, particles in the air which flow between two small plates. Should smoke interrupt that flow of charged particles, the alarm goes off.
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Фото: Telegram-канал «Александр Хинштейн»
Both Aldi and Lidl are a growing presence in the highly competitive British supermarket field. Aldi said in January that it plans to open 40 new stores in the UK this year. It currently employs 45,000 people.