To edit these bookings add the calendars to your google calendar by clicking the "+ Google Calendar" buttons below.
To book a resource go to your elcho.org calendar.
(you will need to be logged in with your @elcho.org username)
Click the time you want to book and in the 'Event' popup
Select 'Edit Event'
On the right hand side click on 'Rooms etc' (even if booking a vehicle)
Select the resource you want to book.