The East drew 0-0 with the North and 1-1 with the South on Saturday before claiming crucial wins against the West (2-0) and the Midlands (1-0) on Sunday at the Abbeydale Sports Centre.
The powerful North team had to beat West by two goals in the final match of the weekend to force a tie at the top, but could only win 2-1.
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Swann, who was making her East & London debut and also represents Beccles (Suffolk) Hockey Club, claimed two assists and played well enough to be recommended for the next England trials.
City of Peterborough pair, defenders Paul Hillsdon and Chris Burden, finished with runners-up medals from the regional men’s over 35 tournament at Nottingham.
East came agonisingly close to winning the event, but conceded a penalty corner goal 30 seconds from time to lose 2-1 to the North West, the eventual winners.
East beat Yorkshire and North East (2-1), London (5-2), West (3-0) and Midlands (4-0).