Championship leader Jack Miller has topped the opening Moto3 free practice session at a chilly yet sunny Silverstone. The Australian struggled to get to grips with the cool conditions early on, but found something in the closing stages. Miller finished ahead of the Spanish duo of Isaac Vinales and Alex Marquez by less than a tenth of a second, while Marquez' team mate Alex Rins posted the fourth fastest time followed by Championship rival Romano Fenati.
Mahindra rider Miguel Oliveira sat perched at the top of the time sheets for a decent chunk of the session but eventually had to settle for the sixth quickest time. Niccolo Antonelli ended in seventh place after suffering from mechanical issues midway through the morning running. Niklas Ajo, Efren Vazquez and Enea Bastianini rounded out the top ten.
Full Results:
| Pos. | Num. | Rider | Bike | Time | Diff | Diff Prev |
| 1 | 8 | Jack MILLER | KTM | 2'16.439 | ||
| 2 | 32 | Isaac VIÑALES | KTM | 2'16.466 | 0.027 | 0.027 |
| 3 | 12 | Alex MARQUEZ | Honda | 2'16.517 | 0.078 | 0.051 |
| 4 | 42 | Alex RINS | Honda | 2'16.655 | 0.216 | 0.138 |
| 5 | 5 | Romano FENATI | KTM | 2'16.869 | 0.430 | 0.214 |
| 6 | 44 | Miguel OLIVEIRA | Mahindra | 2'17.049 | 0.610 | 0.180 |
| 7 | 23 | Niccolò ANTONELLI | KTM | 2'17.150 | 0.711 | 0.101 |
| 8 | 31 | Niklas AJO | Husqvarna | 2'17.305 | 0.866 | 0.155 |
| 9 | 7 | Efren VAZQUEZ | Honda | 2'17.306 | 0.867 | 0.001 |
| 10 | 33 | Enea BASTIANINI | KTM | 2'17.365 | 0.926 | 0.059 |
| 11 | 17 | John MCPHEE | Honda | 2'17.421 | 0.982 | 0.056 |
| 12 | 52 | Danny KENT | Husqvarna | 2'17.567 | 1.128 | 0.146 |
| 13 | 41 | Brad BINDER | Mahindra | 2'17.621 | 1.182 | 0.054 |
| 14 | 65 | Philipp OETTL | Kalex KTM | 2'17.687 | 1.248 | 0.066 |
| 15 | 98 | Karel HANIKA | KTM | 2'17.845 | 1.406 | 0.158 |
| 16 | 10 | Alexis MASBOU | Honda | 2'17.887 | 1.448 | 0.042 |
| 17 | 84 | Jakub KORNFEIL | KTM | 2'17.895 | 1.456 | 0.008 |
| 18 | 13 | Jasper IWEMA | FTR KTM | 2'18.095 | 1.656 | 0.200 |
| 19 | 19 | Alessandro TONUCCI | Mahindra | 2'18.100 | 1.661 | 0.005 |
| 20 | 16 | Andrea MIGNO | Mahindra | 2'18.348 | 1.909 | 0.248 |
| 21 | 58 | Juanfran GUEVARA | Kalex KTM | 2'18.358 | 1.919 | 0.010 |
| 22 | 63 | Zulfahmi KHAIRUDDIN | Honda | 2'18.383 | 1.944 | 0.025 |
| 23 | 38 | Hafiq AZMI | KTM | 2'18.466 | 2.027 | 0.083 |
| 24 | 3 | Matteo FERRARI | Mahindra | 2'18.648 | 2.209 | 0.182 |
| 25 | 55 | Andrea LOCATELLI | Mahindra | 2'18.854 | 2.415 | 0.206 |
| 26 | 21 | Francesco BAGNAIA | KTM | 2'18.884 | 2.445 | 0.030 |
| 27 | 57 | Eric GRANADO | KTM | 2'18.955 | 2.516 | 0.071 |
| 28 | 51 | Bryan SCHOUTEN | Mahindra | 2'19.159 | 2.720 | 0.204 |
| 29 | 99 | Jorge NAVARRO | Kalex KTM | 2'19.546 | 3.107 | 0.387 |
| 30 | 95 | Jules DANILO | Mahindra | 2'20.348 | 3.909 | 0.802 |
| 31 | 66 | Joe IRVING | KTM | 2'21.236 | 4.797 | 0.888 |
| 32 | 4 | Gabriel RAMOS | Kalex KTM | 2'21.446 | 5.007 | 0.210 |
| 33 | 22 | Ana CARRASCO | Kalex KTM | 2'22.206 | 5.767 | 0.760 |
| 34 | 43 | Luca GRÜNWALD | Kalex KTM | 2'23.093 | 6.654 | 0.887 |
| 9 | Scott DEROUE | Kalex KTM |
