Thank you Jimmy T for your valuable advice on this matter.
My husband attended a special Body Corporate meeting to put our case for glass panels on the Balcony at the current standard height. When it appeared likely that we would continue with our request with Fair Trading, as you mentioned, we were given unanimous permission to go ahead with the work. To be fair everyone was surprised how much our Balconies did not conform to current safety standards , especially having three ‘ladder like’ elements as the railing.
Thank you JonH for your input. Our Balustrade Company said that a continuous metal top rail is now the new standard if single glass panels are used. The reason behind this is that if a panel fails someone doesn’t fall, having the rail to protect them somewhat.
Delighted with your assistance Jimmy T. And now very relieved Grandparents.