FTSE 100 ends lower but logs best quarter in a decade

(Reuters) - London's FTSE 100 fell on Tuesday after data showing Britain's economy shrank by the most since 1979 in the first three months of the year took the shine off one of the strongest quarters for UK stocks since the global financial crisis.The blue-chip FTSE 100 closed 0.9% lower, weighed down by a 4% decline in Royal Dutch Shell Plc after it said it planned to write down the value of its assets by up to $22 billion on a lower outlook for oil and gas prices.Gross domestic product..