Monday briefing: What do we know about Prince Andrew and the alleged Chinese spy?

In today's newsletter: Many questions remain unanswered about the person known only as H6, but the complex relationship between China and the UK is sure to be put under the spotlight

Good morning. Espionage is an obviously mysterious business, but there can be fewer greater puzzles in the annals of national security than the one that has arisen in the last few days. If you were the mighty Chinese state, and making a list of British public figures who might hold useful intelligence or influence, what would make you put Prince Andrew on it?

I can't answer that one. But many other questions besides have arisen since it emerged that a businessman and alleged Chinese spy with links to Andrew has been barred from entering the UK on national security grounds - and last night, MPs raised fears that the case shows that the UK has been too eager to strengthen UK-China relations. Today's newsletter explains what we know. Here are the headlines.

Ireland | Israel has announced it will close its embassy in Ireland, citing Dublin's decision last week to support a petition at the international court of justice accusing Israel of genocide. Irish taoiseach Simon Harris called the move deeply regrettable".

Economy | Fifty economists and policy experts have issued a warning to Rachel Reeves that encouraging the city to expand could threaten financial stability and jeopardise growth. The chancellor has claimed that regulations imposed after the global financial crisis have gone too far".

Extreme weather | At least several hundred people are feared to have been killed after the worst cyclone in almost a century ripped through the French Indian Ocean territory of Mayotte on Saturday. Officials said the final toll would be hard to ascertain but could be in the thousands.

Immigration and asylum | Syrian asylum seekers left in limbo after the UK home secretary said the government was pausing their claims have called the decision cruel" and urged officials to resume processing their cases. About 6,500 cases are now in the system.

Guardian and Observer charity appeal | Guardian and Observer readers gave 57,000 over the phones during our annual charity appeal telethon for charities supporting the victims of war and conflict, with the overall total hitting more than 500,000. You can still donate here.