$completedTLF = new ComplexTableField(
				$this,
				'completedTLF',
				'Booking',
				array(
					'Reference' => 'Reference',
					'Member.Surname' => 'Surname'
				),
				null,
				"",
				"",
				"LEFT JOIN Booking_Members bm ON Booking.ID = bm.BookingID LEFT JOIN Member ON bm.MemberID = Member.ID"
			);