Explainers

Another explosive week is expected when MPs return to parliament in September to take on Boris Johnson over his Halloween deadline.
This weekend was the hottest late August bank holiday the UK has ever seen.
It's not just Brazil – Siberia, Greenland and the Canary islands are among the other regions fighting "unprecedented" fires.
The president has previous when it comes to tweeting memes with unknown origins.
Fears are intensifying that Boris Johnson is prepared to evade scrutiny and take the UK out of the EU with no deal.
The 'inverted yield curve' explained in a way that won't make your head hurt.
"Q is you. And Q is me. Q is logic. Q is a plan to save the world."
The much-disputed region is, once again, the epicentre for potential conflict.
“I would be sending Jeremy Corbyn in a cab to Buckingham Palace to say we’re taking over."