<P> This stage takes place after the auditions have been completed, and is also referred to as Deliberation Day, in which the judges look through the acts that have successfully made it to this stage, and begin whittling them down to those who would stand a fair chance in the live semi-finals . The amount that goes through has varied over the show's history, though usually consists of a number that can be divided equally over the semi-finals being held in a series . Once the judges have decided on who will go through, all contestants that have reached this stage are called back to discover if they had progress into the live semi-finals or not . After this has been done, the acts are divided up between the semi-finals that the series will have; usually eight in each series, except for the sixth to tenth series which had nine acts per semi-final . </P> <P> For the fifth series, some acts were asked to perform again, as the judges had had difficulty coming to a final decision on the semi-finalist, and thus needed to see their performance again in order to make up their minds; it is only time in the show's history that this has happened, and has not been repeated since . </P> <P> Contestants that make it into the semi-finals after both stages (or, from series 8, received the Golden Buzzer), perform once more before an audience and the judges, with their performance broadcast on live television; until the tenth series, live episodes were filmed at The Fountain Studios in Wembley, the same site used for The X Factor, but for the eleventh series, the show was broadcast from Elstree Studios . Like the Audition stage of the contest, they must attempt to impress by primarily conducting a new routine of their act within the same span of time; the judges can still use a buzzer in the semi-finals if they are displeased with a performance, and can end it early if all the buzzers are used, and can still give a personal opinion about an act when the performance is over, but neither of these impact how the semi-finalists fare at this stage of the contest, only the last part of this stage . As only two semi-finalists from each semi-final may proceed on to the Final, which two is determined by two different types of votes given towards the end - a public phone vote, and a judges' vote . </P> <P> The phone vote determines the first semi-finalist that wins this stages, and occurs after all the acts in a semi-final have performed, whereupon a special phone line is opened for a short time, which the public can use to vote on the act that they thought was the best; the phone number used, shown after their performance, is the same for all semi-finalists, with the exception of the final two digits, which differs between each semi-finalist in terms of the order of their appearance . Once the lines have closed and the votes have been counted, the act with the highest number of public votes is automatically placed in the final . The judges' vote, held after the result of the phone vote, determine the second act that wins this stage, and is conducted between the second and third most popular acts the public voted on; the other semi-finalist at this point, are eliminated from the contest . The act which receives a majority vote from the judges, moves on to the final; in the event of a tied vote, upon the show increasing the number of judges to 4 from fifth series onwards, the second most popular act moves on to the final . From the sixth series onwards, the show incorporated a new feature in which any eliminated act from the semi-finals could still have a chance of being sent through to the finals, by being picked by the judges to as their "Wildcard" act, later expanding this by allowing the public to vote on a second act to go through into the finals, out of the top three eliminated acts . </P>

Where is britain's got talent semi finals held