Today's crossword puzzle clue is a quick one: Britain's most venomous spider. We will try to … The biggest is the Egyptian giant solpugid with a body reaching up to six inches (15cm) in length and powerful jaws making up about a quarter of that this would be one of the biggest, scariest looking spiders in the world, except for one thing – it isn’t a spider, or a camel for that matter. On the front half of its body (the cephalothorax), it has a dark violin-shaped design, the “neck” of which is formed by a conspicuous furrow on the midline of its back. Britain's 'most venomous spider', the false widow, has caused concern in London and the surrounding areas after allegedly being spotted numerous times over the last month. Most are about 7 mm (0.25 inch) and have a leg span of about 2.5 cm (1 inch). We will try to find the right answer to this particular crossword clue. The small but dangerous arachnid, thought to be Britain’s most venomous spider, had already spawned a gruesome web having lain inside the … Most brown recluse spiders, which are also called violin spiders, live in the western and southern United States. Camel spider (Solifugae) Photo: Silver1 / License The camel spider really is the stuff of nightmares.