Sir James Dyson has won his appeal over a case that argues European suction tests favour his competitors’ vacuum cleaners.
In 2015, he lost a major legal battle in his bid to prove the tests gave misleading higher efficiency ratings to rivals’ appliances.
This successful appeal against that ruling will see the claim sent back to the original EU court for judgement.
A spokesperson at Dyson said they were “shocked and delighted”.
Sir James is a high profile campaigner against EU membership.
Dyson’s rivals include Bosch and Siemens.
His argument rests on the fact that current EU efficiency tests deceive customers because they are conducted when the appliances are operated in “pristine” conditions in laboratories and do not test them in real conditions, where suction may be lost as the bag fills with dust.
Sir James’s appliances are bagless and are sold as cleaners that do not lose suction as they fill up with dust, as do those that use a bag.
The European Court of Justice said rules on the efficiency of vacuum cleaners meant ratings should be based on how the devices were used in practice, not just in laboratories, and that the previous court hearing had not heard all the evidence supplied by Sir James at the time.
The original court ruling in 2015 did accept that “the suction performance and energy efficiency of a vacuum cleaner with a dust-loaded receptacle will be reduced due to dust accumulation” but threw out the case because Sir James could not suggest a new test with which he was happy.
Since September 2014, all vacuum cleaners sold in the EU have been subject to energy labelling requirements.
Source: BBC News