Sir; Retailers keen to cash in on the boost of sales of beer during the World Cup may struggle to predict how much they need to satisfy demand. According to Deloitte, using England's performance in the World Cup as a forecasting tool could be dangerous.

Getting the right amount of beer into the store to meet consumer demand is not easy. Last time there was a European Championships game some stores ran out of beer, so the pressure is on.

More than half of consumers leave their beer buying to the very last minute. The weather is a strong indicator of how much beer we will buy and predictable sunny weather encourages us to plan barbecues for the weekend. Smart retailers will keep their eye on the weather forecast to work out how much beer they will need.