The Brown Rat has only been in Great Britain for about 300 years and has spread virtually over the entire planet, basically wherever humans are. Last week I observed rats in Crawley on three separate days including twice during the day, despite the fact that rats are mainly a nocturnal species. This suggests to me that their local population has soared, probably helped by a hot summer and warm autumn plus ample food sources. I was particularly concerned to observe rats in Crawley’s Memorial Gardens on two successive days. An average rat produces 40 droppings a day and urinates frequently. These are major disease risks as well as being unpleasant to come into contact with.