Rats are large rodents that can weigh up to 600g and a body length up to 8 inches excluding the tail.
The most common rat in the UK is Rattus Norvegicus or brown rat. To confuse things, it can come in a variety of colours. The tail is characteristically bald and scaly.
Rat droppings are around a centimetre in length and black or brown. There is often a smell where they have been active.
A proven vector for disease transmission, you should not tolerate rats in your garden or home.
Treatment is carried out using anti-coagulant baits.