| 6.3.1 | Number of External Groups who use GridPP Middleware | |
| Total: | 3 | |
| Count | Group | Details |
| 1 | MICE Muon Ionisation Cooling Experiment | Monte Carlo Production |
| 1 | JetWeb | QCD Structure Function Calculations |
| 1 | LISA/STEP Gravitational Wave Experiment | GEANT4 Monte Carlo Production |