Brighton should keep their promotion hopes flickering in London Three South East at home to rock bottom Betteshanger.
Survival is the name of the game for Eastbourne, at Tonbridge Juddian, and East Grinstead, who will fancy their chances at Gravesend.
Chichester will be expected to remain top of London Four South East by winning at home to Heathfield and Waldron but Bognor will be hoping for a favour as they continue their title push.
Karl Flynn's in-form side shows just one change for the visit of Beccehamians as Nigel Mitchell (broken finger) is replaced by Chris Pinchbeck in the back row.
Bognor are now just a point behind both Chi and Bromley.
Bromley visit a Hove side who will be playing the generation game as they make a handful of changes. Outside half Ben Hampson is working so his former college lecturer Rob Kift takes over.
Young hooker Nick Allen is out of hospital after suffering a back injury in last week's cup defeat at East Grinstead and has been replaced at No. 2 by his father Pete.
Skipper Richard Jackson returns at lock but flanker Ben Davies, is doubtful with a shoulder injury.
Crawley can take a significant step towards safety if they win at bottom side Guy's Hospital.
There is also a full programme of Sussex One and Two matches, of which Seaford's home clash with Crowborough catches the eye.
Look out too for a chance to see the future county stars in action as Sussex under-20s kick-off their County Championship season against Kent at Waterhall on Sunday (2pm). Winger Ollie Gale leads the side.
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