The Seat Leon ST has been spied for the first time. The heavily disguised test mule – the first ever Leon estate - was spotted testing in Spain.

Seat is pitching the ST as the sportiest estate in its segment. Predicted load space is 590 litres with the rear seats in place.

The ST is expected to feature the same engine line-up as the five-door hatchback, which consists of five petrol and four diesel units with a choice of manual and DSG gearboxes.

Hatchback versions of the Leon go on sale in the UK in March 2013. ST versions will be unveiled in September at the Frankfurt motor show, with customer cars expected for delivery early in 2014. A sporty three-door SC version will be revealed at next year’s Geneva motor show before going on sale next summer.

A hot Cupra version of the Leon ST is also tipped for launch, and will rival the Ford Focus ST estate should it go on sale in 2014.

Matthew Burrow