National Theatre
London, UK
http://www.nationaltheatre.org.uk/
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We are happy to receive and consider unsolicited scripts from the UK and Ireland. We do not accept or consider synopses or treatments, just full script submissions. Scripts should be sent in hard copy with a covering letter to Sarah Clarke, Literary Administrator at the NT's usual postal address with a SAE for their return, if desired. We cannot accept any submissions by email.
National Theatre, 
South Bank, 
London. 
SE1 9PX

Please contact Sarah on sclarke@nationaltheatre.org.uk with any further script enquiries only.
http://www.nationaltheatre.org.uk/discover-more/about-the-national/behind-the-scenes/scripts-literary-department