Survival prospects for the pair have improved in recent weeks, with experienced duo Suji Wickramsinghe and Colin Day hitting match winning centuries at the weekend.
Wickramsinghe hit 132 as Burridge racked up a massive 339-8 to beat St Cross Symondians III (241) by 98 runs.
Hampshire Over-50s captain Colin Day made 147 as Sarisbury posted 286-5 to send beleaguered Ellingham into the three-down drop zone with a 52-run win at Picket Post.
Ropley’s Tim Niemand notched his second consecutive century and a third of the season, hitting an unbeaten 108 as Ropley surprised promotion favourites Purbrook.
The result not only boosted Ropley’s outside prospects of Premier League cricket next summer – but established still unbeaten Alton II as nailed on championship favourites.
The Brewers’ 11th straight win – they beat New Milton (182) by five wickets – gives them a 33-point lead at the top with four matches left to play.
Rivals Portsmouth & Southsea comfortably accounted for Andover II, marooning the Lions in the drop zone.
Former Saints footballer Jason Dodd, pictured, cracked 80 as OTs & Romsey (265-9) edged out Fareham & Crofton by eight runs.
Teenager Harry Warner (98) narrowly missed on a maiden HL century as Hook & Newnham Basics lost out to Bishops Waltham, whose first win in five games eased their relegation concerns.
Totton & Eling II celebrated their first win of the summer, beating Ventnor II by 98 runs.
County Division 2 pacemakers Longparish tumbled to their first defeat – improving Locks Heath ending their eight-match winning sequence at Warsash Road.
James Hughes, Jack Levy and Jack Paskins all hit half-centuries for the Heathens, while William de Cani hit a valiant 83 for Longparish.
Rowledge II are well behind, but a nine-wicket thrashing of Compton & Chandler’s Ford makes them firm favourites to finish at least runners-up.
Seasoned all-rounder Steve Green hit 59 and Australian Matt Chamberlayne (4-22) took a hat-trick, but neither was able to save Easton & Martyr Worthy (181) from a two-wicket defeat by Portchester.
Like Longparish, Parley lost their 100 per cent record – but they rescued a worrying situation to tie their Dorset derby with Ferndown Wayfarers.
Prospects didn’t look promising when Ferndown – having restricted Parley to 168-9 – moved to 101-3.
But their last seven wickets fell for 67 runs and the match was tied.
Parley are 31 points clear of second placed Mudeford, while Follands remain third after beating Cadnam by 15 runs.
Spectators who picnic alongside Burley’s picturesque ground in the New Forest enjoyed a run fest as visiting Ellingham chased down the hosts’ 295-5 to win by five wickets.