"It is important that people understand that taking risks abroad can land them on the wrong side of the law.
"The punishments can be very severe, with tougher prison conditions than in the UK. While we will work hard to try and ensure the safety of British nationals abroad, we cannot interfere in another country's legal system.
"We find that many people are shocked to discover that the Foreign and Commonwealth Office cannot get them out of jail.
"Having a British passport does not make you immune to foreign laws and will not get you special treatment in prison."
More top news
The Supreme Court is set to decide on whether disabled travellers are legally entitled to have priority use of wheelchair spaces on buses.
There will be some brightness, with the best of the sunshine towards the south and southeast where it will again be chilly.
It is hoped the 7,400-mile journey will become a cost-efficient and time-saving way of transporting trade between China and the UK.