Submit a question for live Q&A with Tom Clarke
[Science and technology editor Tom Clarke](https://news.sky.com/author/tom-clarke-823) has been flying over the world's largest iceberg A23a and seen first hand its incredible scale, its cracks, and the dangers it could pose to wildlife and shipping near South Georgia.
He'll be on hand at 1pm to answer you questions - submit yours above, and watch his flyover here...