If you need to delete a booking type, go to:
Select Venues > click on the venue name
Booking Types > Click on the booking type you want to delete so it expands
Scroll down to the bottom of the expanded section and you'll see "delete booking type" option
Make sure to SAVE the page
NB - when a booking type is deleted, it will still appear in REPORTS, but there would not be a way to filter by that type in the Enquiries page, so we would suggest making the booking inactive online if you need it for future reporting.