BEGIN:VCALENDAR PRODID:-//github.com/rianjs/ical.net//NONSGML ical.net 4.0//EN VERSION:2.0 BEGIN:VEVENT DTEND:20260618T120000Z DTSTAMP:20260516T032533Z DTSTART:20260618T110000Z ORGANIZER: SEQUENCE:0 SUMMARY:Updated Guidance on Drainage in Tall Buildings  CIBSE TM70: 2025 UID:CIBSE-EVENT-a1EQx0000065VUQMA2 END:VEVENT END:VCALENDAR