Mullard Space Science Laboratory, MSSL ^{Universities & Research Centres}

The UCL Mullard Space Science Laboratory (MSSL) is the United Kingdom's largest university space research group. MSSL is part of the Department of Space and Climate Physics at University College London (UCL), one of the first universities in the world to conduct space research. Since its establishment, MSSL has participated in 35 satellite missions, 10 of which are currently in operation, and in over 200 sounding rocket experiments.

It takes its name from Mullard Limited, and is located in Holmbury St Mary in the Surrey Hills AONB, near the town of Dorking in the county of Surrey, England.