  We present the results of a search for stellar flares in the first data
release from the Next Generation Transit Survey (NGTS). We have found 610
flares from 339 stars, with spectral types between F8 and M6, the majority of
which belong to the Galactic thin disc. We have used the 13 second cadence NGTS
lightcurves to measure flare properties such as the flare amplitude, duration
and bolometric energy. We have measured the average flare occurrence rates of K
and early to mid M stars and present a generalised method to measure these
rates while accounting for changing detection sensitivities. We find that field
age K and early M stars show similar flare behaviour, while fully convective M
stars exhibit increased white-light flaring activity, which we attribute to
their increased spin down time. We have also studied the average flare rates of
pre-main sequence K and M stars, showing they exhibit increased flare activity
relative to their main sequence counterparts.
