There will be two types of rounds, "known time limit" and
"unknown time limit".
In the known time limit rounds, the number of seconds you have
to find the solution will change from game to game and will be revealed before the game starts. The game ends if
you press the "Next" button or if time runs out. In each game, your budget will be
reduced by £1 if time runs out or if you submit the wrong answer.
In the unknown time limit rounds, the number of seconds you
have to find the solution will also change from game to game, but will not be revealed in advance.
Instead, you will only find out the time limit after ending the game by pressing the "Next" button.
After you have done so, the amount of time you spent on the game
will be compared to the time limit. In each game, your budget will be reduced
by £1 if the time you spent exceeded the time limit or if you submitted the wrong answer.
To summarize: the time limit in a given game can be 60, 30, 20 or 15 seconds.
In the known time limit rounds you will be told the time limit before starting the game.
In the unknown time limit rounds you will only find out whether you made the time limit after completing the game.