The Pilgrims' NFYL team led 3-1 against Fowler Academy – but eventually succumbed 4-3.
United's goals were scored by Sam Finch (2) and Joe Todd.
Boston: Alfie Harney, Aron Ealham, Tyreece Keating, Archie Bradford (Finley McDaid 75), Elod Nadasdi, Freddie Lound (Jack Dixon 60), Joe Todd, Josh Panton, Freddie Shinn (Toby Foreman 13), Sam Finch, Daniel Bridges. Sub (not used): Sam Buckland (gk).
Referee: Alan Butler.