What is the worst thing about the climate of the British Isles?

The worst thing about the climate of the British Isles is probably that the weather here is usually not that warm as in other countries. Take, for example, Spain. This European country has a mild Mediterranean climate. It's often hot and the sun is shining in Spain. However, rains are common in British countries. Sometimes, it rains cat and dogs, so you have to be very cautious and remember to take an umbrella with you before leaving the house.