Red Arrows at Old Warden? Heresy! Though I suppose they are fairly elderly airframes nowadays...
Radius of the Arrows' Temporary Restricted Airspace is 6nm which gives an area of 114 square nm, which is a heck of a lot of ground particualry in GA-heavy areas. So they do expect a couple of infringements per year, unfortunately. But bear in mind that they're using the MoD's clout to close that airspace, otherwise they've no more 'right' to it than anyone else ( outside the aerodrome control zone, if any ).