• Theory Group Seminars (Tuesdays: Room 503 Huxley, 1.30pm-2.30pm)
  Organiser: Antoine Bourget and Edoard Vescovi

• String Theory Seminars (Wednesdays: Room 503 Huxley, 2.00pm-3.00pm)
  Organisers:  Matthew Roberts and Victor Lekeu

• Student Seminars (Thursdays: Room 503 Huxley, 5.00pm-6.00pm)
  Organisers: Matthew Cheung

• Cosmology Seminars (Fridays: Room 503 Huxley, 1.00-2.00pm)
  Organisers: Jose Eliel Camargo-Molina (Theo), Ben Farmer (Astro) and Nick Wardle (HEP)

• Quiver Meetings
  Organiser: Julius Grimminger 

There are also less formal discussion groups that meet regularly: 

• Relativity Lunch (Thursdays: Room 602 Huxley, 1.00pm)
  Organiser: Fay Dowker

• Theoretical Physics Book Club (Fridays: Room 503 Huxley, 4.00-6.00pm)
  Organiser: tba

Seminars are normally announced on the seminar mailing list, which includes automatically all group members. External people can also subscribe to the list.