London markets were buoyed by strength in the travel and banking sectors, which offset weakness in mining and oil stocks.As of 14:30 BST, the FTSE 100 was trading 1.5% higher at 6,617.Travel and leisure stocks including Easyjet, IAG, TUI and IHG rebounded after a recent sell-off. The sector had been hit by the potential impact on tourism from the Greek debt crisis and recent terrorist attacks.Airlines were also performing well after an Airports Commission report declared that a third runway should be built at Heathrow. The Commission said the runway was "crucial for the UK's long-term prosperity".Tesco was boosted by positive sentiment from HSBC, which reiterated its 'buy' rating on the stock and said that the supermarket group is likely to be the preferred choice of suppliers across the grocery industry.Banking giants RBS, Standard Chartered, Lloyds and Barclays were all making gains in London, recovering from sector-wide declines in recent sessions.Miners Randgold Resources, Glencore, Antofagasta, Anglo American, Fresnillo and Rio Tinto extended losses for the third consecutive day, as both base and precious metal prices fell.RiserseasyJet (EZJ) 1,606.00p +3.88%ARM Holdings (ARM) 1,075.00p +3.66%Royal Bank of Scotland Group (RBS) 363.70p +3.47%TUI AG Reg Shs (DI) (TUI) 1,065.00p +3.40%Barratt Developments (BDEV) 634.50p +3.25%InterContinental Hotels Group (IHG) 2,648.00p +3.20%AstraZeneca (AZN) 4,138.50p +2.97%Compass Group (CPG) 1,083.00p +2.85%Taylor Wimpey (TW.) 191.00p +2.80%Prudential (PRU) 1,575.00p +2.77%FallersRandgold Resources Ltd. (RRS) 4,229.00p -1.31%Glencore (GLEN) 252.25p -1.19%Antofagasta (ANTO) 681.50p -1.16%Fresnillo (FRES) 688.00p -0.86%Anglo American (AAL) 912.40p -0.66%Tesco (TSCO) 211.45p -0.52%HSBC Holdings (HSBA) 569.30p -0.14%