UPDATE 2-Britain's recovery gives boost to Santander profits, revenues
* Profit rises 18 pct in second quarter
* Net interest income beats forecasts
* British arm becomes main profit engine, Spain lags
* Shares fall (Adds more details on UK, Brazil)
By Sarah White and Jesús Aguado
MADRID, July 30 (Reuters) - A buoyant performance from its British business helped Spain's Santander to increase second-quarter revenues, offsetting a weaker home market and driving an 18 percent rise in net profit.
The strong growth is a positive sign for the bank's boss Ana Botin, who has embarked on plans to boost profits by expanding the group's lending rather than through acquisitions.
Europe's economic recovery is starting to help and a turnaround in the British market has made this the biggest engine of Santander's profits, ahead of Brazil.
In Britain, lending rose nearly 3 percent from the end of April to June, when measured in euros. Net interest income, a measure of earnings on loans minus deposit costs, grew more than 4 percent quarter-on-quarter, even though the average interest the bank charges on loans shrank. Continuación...