LONDON — Every year, the British public gains access to declassified cables and sensitive memos from the top tiers of the government: glimpses of diplomatic outposts around the world, ministers’ thoughts scribbled in margins, and disputes between famous leaders, released by the country’s National Archives.

And sometimes, the public gets to see notes about a horse.

The National Archives on Friday released a new batch of documents, mostly from 1994, that tell of internet anxiety at the prime minister’s office, Margaret Thatcher’s thoughts of Nelson Mandela and the journey of a stallion from Turkmenistan to London.

Not all the files were immediately available online, but most were reviewed by journalists earlier this month.

The National Archives keeps these files under lock and key and releases them periodically, as their confidential status expires. Here’s some of this year’s trove:

Keeping Up With the Clintons

In 1994, internal memos advocated that 10 Downing Street embrace the internet, to bring the prime minister up to speed with President Bill Clinton’s White House, which was already posting public announcements online.