BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VTIMEZONE
TZID:Europe/London
BEGIN:DAYLIGHT
DTSTART:20210328T020000
TZOFFSETFROM:+0000
TZOFFSETTO:+0100
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3
TZNAME:BST
END:DAYLIGHT
BEGIN:STANDARD
DTSTART:20211031T010000
TZOFFSETFROM:+0100
TZOFFSETTO:+0000
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10
TZNAME:GMT
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTAMP:20260404T174748Z
UID:thirlmere-trip-night-navigation-course
DTSTART;TZID=Europe/London:20211023T180000
DTEND;TZID=Europe/London:20211023T210000
LOCATION:St. John's Church\, St. John's in the Vale\, CA12 4UB. Grid ref: N
 Y307225
SUMMARY:Thirlmere Trip - Night Navigation Course
END:VEVENT
END:VCALENDAR