Illingworth helped the Scots see off St Paul’s 6-0 at Les Quennevais to take Scottish a point clear of second-placed First Tower.
The Tower lads leap-frogged St Paul’s into second on goal-difference, after they won by the odd-goal in five away to Jersey Wanderers at the Hockey Club.
Aarron Scott and Declan Sowney also scored for Scottish with Jay Reid and Barry Keith on the mark for Jersey Wanderers and Tom Gibb (two) and Aaron Crowe registered for Tower.
Sporting Academics beat St Peter 3-1 away to open up a five-point advantage at the top of Division II.
Sam Furness, John Shilliday and Ross Davison scored for the Accies and Matt Sartin for St Peter.
Grouville won their first points of the season after thrashing Rozel Rovers 10-2 at Le Couvent.
Aaron Bowen and David Poingdestre hit hat-tricks for the parishioners while Henry Adelmann, Sam Daniel, Jordan Brown and Henry Le Maistre scored singles.
Nick Bolton bagged both Rozel’s consolations.
Jordan White and George Camsell scored St Clement’s consolations in a 4-2 home defeat by St John.
Kurtis Guthrie was joint-top individual goalscorer in the under-14 division by scoring five of First Tower’s goals in a 10-0 mauling of Grouville.
Luke Kellett, Andy Rabet, George Ghaffari, Killian Dorey and Alex Carpenter took the score to ten with Tower also missing the target with two penalty kicks.
Daniel Tardivel bagged five of St Paul’s goals in a 10-1 success over the home team at St Clement.
Andrew Gee and Oliver de la Cour added doubles and Blake Derbyshire a single.
Grant Johnson replied.
Scott Welsh and Clayton Romeril hit hat-tricks in St Peter’s 6-0 home success over St John while Jersey Wanderers crushed Rozel Rovers 9-0 with Daniel McAvennie (four), Sam Dawkins, Charlie Payne, Ryan Connan, Kamen Nafkha and Bradley Rimeur on target at the Hockey Club.
Michael Ahier and Ryan Shaw netted St Brelade’s goals in a 2-1 success away to St Ouen.
Karl Smith replied.
Jack Hinton, James Goddard and Finlay Hare each scored a brace as St Paul’s B beat St Peter 7-3 in the Under-12 White section.
Tom Turquet also notched for the winners.
Luke Philpott and Cyril Favre registered Jersey Wanderers B’s goals in a 3-2 defeat against Jersey Scottish.
Grouville won 4-0 in the Blue section against St Ouen following goals from Callum Tingley (two), Jake Dunford and Tom Le Moignan.
