Examples:
<code>.pagetypebookingslist .bookingtable tr > *:nth-child(12) {display: none;}</code> will hide the first column which is 'Number'.
<code>.pagetypebookingslist .bookingtable tr > *:nth-child(1011) {display: none;}</code> will hide the tenth column which is 'Email'.
===Hide column on the BOOKINGS table===