| 2021 Undercroft Congress Swiss Teams |
| Number | Team | Team Members |
| 1 | DALY | GERRY DALY - VIV WOOD - MARNIE LEYBOURNE - TREVOR FULLER |
| 2 | DUTTON | NIGEL DUTTON - ALAN HARROP - MARIE-FRANCE MERVEN - KIMBERLEY ZHAO |
| 3 | MUNRO | DAVE MUNRO - FISKE WARREN - DAVID SCHOKMAN - CATHY HOOD |
| 4 | CHEW | JESSICA CHEW - DAVID MATTHEWS - VAL BILTOFT - PAULINE COLLETT - MARTIN DORAN |
| 5 | BEDDOW | JOHN BEDDOW - EGMONT MELTON - TAD BIEGANSKI - ANDREW SWIDER |
| 6 | COOPER | RON COOPER - SIMON BRAYSHAW - DEANA WILSON - RENEE COOPER |
| 7 | BROOKS | DI BROOKS - TERRY COLLINS - LOUISE COLLINS - FLORENCE MALTBY |
| 8 | GRENSIDE | SUE GRENSIDE - RICHARD GRENSIDE - PHIL POWER - KATHY POWER |
| 9 | BRAHMA | GWYNEIRA BRAHMA - STELLA STEER - JAMES STEER - PHIL BAPTY |
| 10 | RHODES | MAURA RHODES - RICK RHODES - CHRISTINE JENKINS - KATRINA WILL |
| 11 | MORIN | SE-MOI LOH - CASSIE MORIN - JEANNE HEY - HELEN ARENDTS |
| 12 | COWELL | DAVID COWELL - BRIAN FENSOME - STEVEN ROGOYSKY - HELEN SMIT |
| 13 | MALE | LILIA MALE - CAROL FENSOME - TUYA COOKE - BEATA BIEGANSKI |
| 14 | ZOTTI | VIVIAN ZOTTI - CHRIS CULLEN - THERESE GARBUTT - GILL GAVSHON |
| 15 | KLEIN | LOUIS KLEIN - CHRISTINE ROSS - MARILYN ATKINS - LUBA KLEIN |
| 16 | ERRINGTON | LYNNE ERRINGTON - JOANNA TENNYSON - MARTIN BROOME - VALERIE BROOME |
| 17 | COLTRONA | CONNIE COLTRONA - DEBBIE JAMES - SATISH BEDEKAR - MIKE MAHON |
| 18 | COULTER | DAVID COULTER - PAULINE COULTER - GILL BLAKEY - ROSS BLAKEY |
| 19 | LAWES | MICHAEL LAWES - MAGDA LAWES - ALAN TOLLEY - DAWN DULY |
| 20 | KOAY | MAVIS KOAY - CHRISTINE BACON - ALFRED LEUNG - DIANNE DWYER |
| 21 | DAWSON | JENNY DAWSON - HARRY CROSBY - EDWARD ROSCOE - RICK MORRIS |
| 22 | JONES | DOROTHY JONES - DAVID SAUNDERS - BERNIE PLATH - SHARON DYBALL |
