The implementation of Operation Temperer across the country will inevitably have an affect on forces sport, with several events already cancelled as units are placed on standby for increased security duties.
But a record 212 riders were able to compete in the second round of the Army Cycling Union mountain biking cross-country series.
Mountain biking is one of the fastest growing sports in the military and this was the first time the Army Cycling Union had taken an event to Sherwood Pines, north of Nottingham.
Organisers had spent months talking to the Forestry Commission to make it possible, but there were concerns that the consequences of the terrible events in Manchester might reduce numbers or even cause the races to be cancelled as personnel were called up for guard duties.
There were in effect three races here: The elite riders from the Army, Navy and RAF took on five laps of the very demanding 5-K course. The second wave would race until they were lapped by the elite men and women. For some, that would mean stopping after three laps. And later in the day there was a second, bigger, race for the more junior riders.
With a twisty course and high temperatures it all made for a pretty tough event.
Those putting the most power down were the RAF, taking first and third places in the elite race.
There are three more races in the series, the next at Tidworth in a fortnight, which will also be the Army Championships, followed by the Inter services in July.