By Benedict Tetzlaff-Deas Brits have been warned to prepare for an invasion of exotic spiders after a new species was discovered in Cornwall. Anasaitis milesae – a tiny jumping spider – is less than 3mm long and was found on the grounds of the University of Exeter’s campus in Penryn, before being found at a second site 30 miles away. No other record of Anasaitis milesae has been found anywhere else in the world. It is however related to other species found in the Caribbean, meaning it is likely to have arrived in the UK on plants imported from the region. It was named by jumping spider special…