Horsham and Chichester are both unbeaten in Sussex One after convincing victories.
Horsham are top on points difference after an 83-0 win over a Sussex Police outfit who only had 12 players because of work commitments.
Paul Thurston ran in five tries and also kicked nine conversions. Other scores came from Andy Stone (2), Dan Senneck, Peter Mason, Ian Bond, Richard Billings, Doug Wright and fly half Tom Wright who capped an excellent debut with a try.
Chichester had an easier afternoon than they were anticipating against Hastings & Bexhill who were beaten 50-15 at Oaklands Park.
Winger Toby Young capped a man-of-the-match display with a hat-trick. Tom Polhill (2), Nigel Turner, Tim Rogers and skipper Ben Polhill, who has scored in every game this season, also crossed. Richard Johnson landed a penalty and conversion.
Heathfield coach Herb Merritt rated his side's performance in the 24-5 win over Crowborough as their best of the season.
He said: "Crowborough were a good side and they brought the best out in us, our backs were particularly good."
Tries came from Julian Wates (2), Rob Streeter and Mike Hole.
One or two of the Chichester Institute players could be excused for feeling a bit fragile after celebrating Graduation Ball the previous night. It showed too as the students went down 8-7 to Hellingly. Neil French converted his own try for the hosts while Ian Bates' try and a penalty by Richard Whitland won it for the visitors.
St Francis and Rye drew 10-10 in the other game.
Seaford beat Uckfield II 41-5 in a friendly, running in tries from Stuart Webb (3), Lee Prior, Danny Newby, Gavin Hutt and James Anderson.
BA Wingspan are through to the final of the Sussex Plate after a 22-18 home win over Barns Green. Five penalties from Jim Martin looked to have won it for Green deep into injury time, but Wingspan took advantage of poor defence to score a converted try. They will now play either Horsham or Seaford in the first round of the Intermediate Shield.
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