CreaseCam

• ECB Fielding Regulations: no Under 15 within 8 yards (7.3 m) and no Under 13 within 11 yards (10 m) of the middle stump, except behind the wicket on the off side, helmet or not; the umpire must stop play at once, but nobody can judge 10 m by eye → CloseCheck: two CloseEye camera pods (striker's-end stand + sightscreen) place each fielder's feet to about ±0.25 m (est.) before the run-up; three short buzzes on the umpire's pager for INSIDE, a dot map on the ReviewPad, CHECK near the line never buzzes
• County protocols (Cornwall, Devon, Yorkshire, NCU) make the umpire note bowler, over and ball for each suspect action, compare notes at the second, tell the captain without calling no balls, and send a report signed by both within 48 h; clubs then pay £300 for an ECB assessment from 200 Hz video. Law 41.3 tampering means 5 penalty runs and a joint report → ActionMark: a pager double press keeps that delivery's side-on clip with over and ball, a "compare notes" buzz at the second mark, a signed report draft with a 48 h countdown; Assessment Clip mode at about 211 fps (est.); a new BallCheck dock photographs the ball under the same LED light at every check. It never judges legality.
• Many club leagues have one appointed umpire with a batting-side player at the other end (YPLN 2026 briefing, older league conditions), so the lone umpire looks down for the front foot and up for LBW on every ball; the ICC moved front-foot calls to the TV umpire with technology (2020 trial, 4,717 balls) → FootCall reads the landing foot against the crease plane on the node at the bowling end and gives two long buzzes on the umpire's wrist in about 0.15 s, before the ball arrives, only when no part of the foot is behind the line (MCC Law 21.5.2); CLOSE never buzzes, so the bowler keeps the benefit of the doubt; a new foot-hood snoot takes the 50 mm lens and a polariser
• Club umpires call waist-high full tosses by eye from 20 m; the square-leg umpire sees height best but the bowler's-end umpire calls it, and leagues write their own beamer rules (MCC Law 41.7, NZC umpire booklet, Club Cricket Conference) → HeightCheck reads the ball height where it crosses the popping crease against that batter's waist and buzzes both pagers in about 0.15 s; a new wrist cradle puts the pager on the bowler's-end umpire's wrist; the umpire still decides "dangerous"
• Leagues refuse a club's own camera (Kent club policy: streams must not be used to question umpires; Ballarat: a club camera overturned a run-out and the association called it unfair) → League Mode: umpire-only 5 s pager press, run out / stumped / hit wicket only, frames only to a pocket ReviewPad, nothing live to the scorer or stream, NO REVIEW fallback, and a draft playing condition for leagues
• MCC Laws 2026 (in force 1 Oct 2026): umpires must judge deliberate short running and a keeper wholly behind the stumps after release, by eye → short-turn and keeper-at-release checks on the crease nodes, a per-batter short-turn tally, and a belt-clip Umpire Pager that buzzes before the next ball; flags a turn about 2 cm short (est.)
• A phone on a tripod is rolling-shutter, 60 fps at best and unsynced: a sliding bat moves 133 mm per frame → global shutter plus interpolation at the SmartStump bail-off timestamp, about ±10 mm (est.)
• Nothing may stand on the field and the square-leg umpire stands on the crease line → nodes stand outside the boundary on the off-side crease extension with 35–50 mm lenses

Bowler's-end umpireSquare-leg umpireFielding captainLeague cricket officer

1. 01Trigger: the umpire thinks a bowler's arm straightened on the 3rd ball of the 14th over
2. 02Detection: a double press on the wrist pager marks it; the node keeps that side-on clip with bowler, over and ball
3. 03Alert: on the second mark both pagers buzz short-long, and the ReviewPad says compare notes and tell the captain, no no balls yet
4. 04Action: after the match both umpires sign the drafted report on their pads and send it to the league inside 48 hours

Outcome: The report has exact deliveries, times and clips instead of memory; the league and the ECB lab still decide