Defeat at Trojans has confirmed Portsmouth & Southsea will be returning to the Hampshire League next season.
Dave Tiller’s young side posted 217 for eight but Trojans reached 218 for five in response.
It’s been tough for Portsmouth & Southsea in Southern Electric Premier League division three.
‘We lacked the necessary strength in depth to survive,’ said Tiller.
‘It is a question of regrouping next season and seeing what we can bring to the table.
‘I am stepping down as captain and feel it is a job for a younger person who can give greater commitment to it.
‘Hopefully I will still be around and making a contribution.’
Tom Farnworth recorded an outstanding 50 in only his second Southern Electric Premier League game.
And 15-year-old Ollie Perrin showed great promise with the new ball.
United Services were relegated from division two after a 28-run defeat by Langley Manor at Burnaby Road.
Josh Booth (73) and Damian Carson (68) led the run chase but US fell short of their target.
Portsmouth grabbed the six points they needed to secure the division three title with a 40-run success over Fair Oak.
Havant II remain on course to finish runners-up with their 99-run triumph over St Cross Symondians II.
In the premier division, Havant leapfrogged Ventnor into second place after cruising to a seven-wicket win against St Cross Symondians at Havant Park.
Ben Walker took two wickets for 19 runs in his 10 overs and Rob Gibson grabbed three for 40.
Pete Hopson (97 not out) and Chris Morgan (71) led Havant home in their reply.
Ventnor suffered a seven-wicket defeat at the hands of Hampshire Academy.