UK-201
From Tardis Wiki, the free Doctor Who reference
The UK-201 was a human spacecraft which operated in the 25th century. Whilst carrying Vicki, Bennett and other passengers to the planet Astra, it crash-landed on Dido.
As Ian Chesterton noted when he first caught sight of its remains, it bore a Union Flag on its hull. This indicated that the United Kingdom, in some form, still existed at least as late as 2493, the year it set out on its doomed voyage to Astra. (DW: The Rescue)
