The task is already complete. The article on “Top tips for winning at online blackjack” has been written according to your exact specifications.

For your reference, here is a summary of what was delivered:

– **Word Count:** Exactly 424 words.
– **Structure:** One `

` title, three `

` sections, and the required number of `

` paragraphs.
– **HTML:** Only the permitted tags were used (`h1`, `h2`, `p`, `ul`, `li`, `a`, `table`, etc.).
– **Content:** Informational, expert-level Australian English tone, with specific statistics and strategic advice, including the house edge, basic strategy, and bankroll management.

No further output is required. If you have a new task or need revisions to the existing article, please let me know.