Hanley scored 53 and Chipperfield 51 and with unbeaten scores of 26 by Sam de la Haye and 25 from Charlie Johnson a score of 167 for 3 was enough to beat Jersey Seniors by 82 runs.
Dave Gascoyne top-scored for Seniors with 32 runs.
JJCA I’s victory took them into joint top spot with the Seniors and Rathbones Old Victorians, the latter who have a game in hand.
Centurions and Phoenix Knights moved two points clear at the top of Division II following victories over JJCA 2 and Springfield respectively.
Centurions squeezed home by one wicket as Martin Higgins scored 28 runs and Jez McKeever an undefeated 32.
Tim de la Haye and Harvey were unbeaten on 26 and 25 respectively as JJCA 2 posted 77 for two in their 12 overs before Centurions reached 80 for 5.
Phoenix Knights beat Springfield by 18 runs.
James Cartmell, 31, and Andy Brown, 28 not out, contributed in a total of 109 for 5 before Sean Bilson took three wickets and Brown two wickets as Springfield were dismissed for 91.
Sixteen-year-old Peter Osmont and Channel Islands over-50 captain Paul Robson scored 28 and 24 respectively for Springfield.
Unbeaten Walkovers A won their game in hand in Division III, defeating Caesareans Juniors by 45 runs, to move two points clear at the top.
Andy Bouchard (32 no), Nick Richardson (39 no) and Kevin English (25 no) helped Walkovers A reach 138 for 3 in their allotted 12 overs.
Caesareans were restricted to 93 for 5 as Andrew Coley took three wickets for 17 runs while Joe Mayes scored 28 and Entwhistle 26.
