I missed this report when it was published in Nov 2020, others here
may have missed it too. It has market data highly relevant to TNT,
note the comparison of market size between cyber security and retail e-commerce:

https://www.austcyber.com/news-events/new-data-shows-size-growth-and-potential-australias-cyber-security-sector
w w w . a u s t c y b e r . c o m /

New data shows size, growth and potential of Australia’s cyber security sector

highlights...

..."Cyber security continues to be one of the most rapidly expanding sectors worldwide, with global spending on cyber security products and services increasing by 30 per cent from 2017 to 2020. This year alone, Australians spent approximately A$5.6 billion on cyber security from both local and international providers, a figure that is expected to increase to A$7.6 billion by 2024."

..."For the first time, the gross value added (GVA) of Australia’s cyber security sector can be estimated, at $2.3 billion. The cyber security sector’s GVA is already comparable to other digital sectors such as computer software ($4.2 billion) and retail e-commerce ($3.2 billion)."

All IMHO, DYOR