Errors proved costly as Gosport & Fareham ended their London one south home campaign with a 32-18 defeat by Sidcup at Gosport Park.
The home side led 12-10 at the end of the first half after playing into a gale-force wind.
But they fell away late in the second period.
‘It is a shame really,’ said Gosport head coach Neil McRoberts.
‘We did really well in the first half but failed to repeat the same intensity after the break.
‘It was our second-half performance that let us down.
‘When we were 18-18 with 20 minutes to go I still felt we could go on and win the game.
‘Unfortunately, discipline let us down and we had two players yellow carded.
‘We lost our shape after that because we were forced to reshuffle to try and cover it.
‘In the closing stages Sidcup punished us for that and pulled away to win.’
After falling 10-0 behind at the start of the game the home side hit back through two Wes Dugan tries.
The second score was under the posts and Tom Lewis added the conversion.
Lewis added two penalties in the second half.
‘Mathematically we can still go down,’said McRoberts.
‘That means we need to go to Charlton Park in two weeks’ time and get the result to put those fears to bed.’
Locks Heath Pumas had their unbeaten run ended in Hampshire two as they lost 15-8 at Chineham.
In Hampshire one Fareham Heathens finished their league season with a creditable 29-17 win over Farnborough at Cams Alders.
Heathens are looking to end the campaign with silverware when they go to Chineham in the Hampshire plate final next month.
Coach Bernie Rhodes is calling on Heathen’s members, past and present, to turn out in force.
‘Home advantage will undoubtedly help Chineham and I am calling on all Heathens to help us reduce that advantage,’ said Rhodes.
‘We lost out in 2014 against Farnborough in the final and I would very much like to bring some silverware back to the club this year.’
Petersfield edged to a 19-14 win at basement-club Alton.