The worldwide gas emissions regulations are getting more stringent. Together with the fluctuations of the finite fuel resources, it is expected that the use of unconventional and renewable fuels will increase. Hydrogen fuel is a zero-emission, renewable energy source. It has a great potential as one of the principal sustainable energy sources of the future. A gradual conversion to a hydrogen based energy system, if the necessary government framework is provided, is far more likely to happen. This opportunity can be found in the natural gas grid of the Netherlands. This natural gas infrastructure is accessible for both the industry and Dutch households. The IEA HGH RD programme has conducted research about this gradual transition, with promising results. It is currently therefore a key agenda point for the Dutch government. In order to safely make a transition to natural gas with hydrogen addition, it is of importance to know the fundamental combustion properties of these fuel mixtures. These properties are needed for the prediction of and modeling of combustion systems. Traditionally, the quantification of the combustion process is done by focusing on measuring properties such as laminar burning velocity, ignition and extinction characteristics, flammability limits and emissions. The laminar burning velocity is an important property of combustion mixtures. It contains fundamental information on reactivity, exothermicity and diffusivity.