Guests have been asked to apply via two ballot systems, the first of which opens to the public today (22 June) and runs until 29 June.
The pop-up eatery will reopen from 25 July until 7 August. Visitors can request to dine either at lunch or dinner and they can apply for a maximum of four tickets.
BT Tower expects to give approximately 1,400 people the chance to experience the historic restaurant across the fortnight. All profits from the events will go towards ChildLine.
For those unsuccessful in their applications, the tower will be opening the doors to its 34th floor for 30 minute ‘flights’ in October.
Gavin Patterson, BT Group’s chief executive, said: "I’m delighted we’re able to reopen the restaurant to the public. The BT Tower was a unique feat of engineering when it was first built and it remains an important and much loved building today.
"It has been a working icon of technological innovation for 50 years and what better way to celebrate that than by opening it to the public. The ballot winners are in for a treat as they will be able to see London in all its glory."
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