June 17, 2023 @ 8:00 am - 5:00 pm Open Water Lake Day Stanborough Lakes, Welwyn Garden City Stanborough Lakes, Welwyn Garden City
June 25, 2023 Swimming Regional Development Programme Stanground Academy, Peterborough Stanground Academy, Peterborough
July 9, 2023 SEER Open Water Championships 2023 Whitlingham Country Park, Whitlingham Lane, Trowse, Norwich, Norfolk, NR14 8TR Whitlingham Country Park, Whitlingham Lane, Trowse, Norwich, Norfolk, NR14 8TR
July 15, 2023 @ 4:00 pm - 6:00 pm Water polo Regional Academy Training Riverside Ice and Leisure Centre, Chelmsford, Essex Riverside Ice and Leisure Centre, Chelmsford, Essex
September 16, 2023 @ 4:00 pm - 6:00 pm Water polo Regional Academy Training Riverside Ice and Leisure Centre, Chelmsford, Essex Riverside Ice and Leisure Centre, Chelmsford, Essex
September 17, 2023 @ 3:30 pm - 6:30 pm SEER Para-Swimming Meet Newmarket Leisure Centre Newmarket Leisure Centre
October 7, 2023 @ 10:00 am - October 8, 2023 @ 6:00 pm SEER Diving Club Championships Southend Leisure & Tennis Centre Southend Leisure & Tennis Centre
October 7, 2023 @ 4:00 pm - 6:00 pm Water polo Regional Academy Training Riverside Ice and Leisure Centre, Chelmsford, Essex Riverside Ice and Leisure Centre, Chelmsford, Essex
October 22, 2023 @ 3:30 pm - 5:00 pm Water Polo Inter Regional U14 Boys Training session Woodside Leisure Centre Watford, United Kingdom
October 29, 2023 @ 3:00 pm - 5:00 pm Water Polo Inter Regional U14 Boys Training Session Bedford School Burnaby Road, Bedford
November 3, 2023 @ 6:00 pm - November 5, 2023 @ 7:00 pm SEER Short Course Championships Inspire Luton Sports Village Inspire Luton Sports Village
November 12, 2023 @ 1:00 pm - 5:00 pm SEER Masters Inter Counties Competition Bury St Edmunds Leisure Centre, IP33 3TT
November 18, 2023 - November 19, 2023 Water Polo U14 Boys Inter-Regionals Walsall Gala Swimming & Fitness Centre Tower Street, Walsall, United Kingdom
November 18, 2023 @ 4:00 pm - 6:00 pm Water polo Regional Academy Training Riverside Ice and Leisure Centre, Chelmsford, Essex Riverside Ice and Leisure Centre, Chelmsford, Essex
November 26, 2023 @ 2:00 pm - 5:15 pm Disability Training Session John Warner Sports Centre Stanstead Rd, Hoddesdon, United Kingdom