In 1974 the Tornado and Storm Research Organisation (TORRO), initially called the Tornado Research Organisation, was founded by Terence Meaden to study reports of previous and new tornadoes as well as to conduct site investigations to confirm or disprove reports across the UK. These site investigations also allow further details to be built up around events, such as estimated wind speed based on damage caused, track width and track length. Since its inception TORRO has been cataloguing tornado reports extending back as far as 23 October 1091, when the first recorded tornado was noted in central London (Brown et al., 2012).
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