Ryan Ellis netted a stoppage time winner for the Reds in the 2-1 victory.
Chris Johnson had put the hosts ahead in the first half but Jordan Cleghorn levelled for Langford in the second period.
In the SSML Premier Division Stotfold salvaged a deserved point at St Margaretsbury on Tuesday when Paul Donnelly netted a late penalty.
The hosts had taken the lead through Anthony Anstead early on. Nathan Aulsberry levelled early in the second period only for Anstead to score his second. But when Gareth Cottenden was manhandled in the box, the referee awarded a penalty which Donnelly converted.
Also in the SSML Premier, Biggleswade United lost 2-0 to high-flying AFC Dunstable, with goals from Craig Butler and BJ Christie in the second period.
In the UCL Division One Potton United drew at home to Wootton Blue Cross on Tuesday night.
Jason Simons volleyed Wootton ahead in the first half but Potton levelled through an Adam Dunville penalty on 65 minutes after the ball was handled in the box.