What is the fine-grained topic of the following text: According to the The British Beer & Pub Association 2 billion pints were consumed in April, May and June, a fall of 9.8pc on the same three months in 2010, a period that was boosted by World Cup fans stocking up on cans to drink at home while watching the games. Only return the topic.
Decrease in British beer consumption in the second quarter compared to 2010.