Bulk files CT transcribes all coupon re-set / Corporate Action data in to a standardised format for onward delivery (typically, twice a day but more available).

  XML is also available.
Event diaries (coupon re-set / payment dates) and all executive / operational data can be reconciled (typically on a rolling 7 day basis) against Calculation and Paying Agents.
Bulletin Board
A public bulletin board is presented online. No private / unlisted instrument data is available here.
All Corporate Actions can be added to the coupon re-set file sent by the Calculation Agent. Private data would be included if relevant to that Clearing House.