There was a photo of Newton Hall here on this blog, three weeks ago. An archaeological dig has been taking place in the grounds of the hall over those weeks and the "open days" mark the end of this dig. Apart from members of the public being able to inspect the archaeologists' trenches and the various finds that have been uncovered, members of a re-enactment group, Colonel Montagu's Regiment of Foote, were there to present living history and drill displays, acting in character throughout the two days.
The photo shows the five musketeers firing their muskets, which made quite a loud noise, although not as loud as the canon that was also fired at times during the two days. There was actually a reasonably-sized crowd watching the drill display, but there are all standing out of view to my right and left!
Photos of the dig in progress, and some of the finds uncovered, can be seen in this album.
See Google Street View of this location.